CN106655407B

CN106655407B - Battery charging method and device, electronic equipment, adapter and charger

Info

Publication number: CN106655407B
Application number: CN201710044422.2A
Authority: CN
Inventors: 党琦; 曾巧; 方占召; 陶强
Original assignee: Ningde Amperex Technology Ltd
Current assignee: Ningde Amperex Technology Ltd
Priority date: 2017-01-19
Filing date: 2017-01-19
Publication date: 2020-08-07
Anticipated expiration: 2037-01-19
Also published as: CN106655407A

Abstract

The embodiment of the invention provides a battery charging method and device, electronic equipment, an adapter and a charger. In one aspect, embodiments of the invention include a first stage and a second stage; performing the first electrical phase when the initial temperature of the battery is less than a first nominal temperature; and after the first stage is finished, executing the second stage; the first stage comprises pulse charging and discharging the battery to a specified stop condition; the second phase comprises at least one charging phase, each of the charging phases comprising at least one charging cycle, each of the charging cycles comprising: the battery is charged for a first charging duration, and the battery is pulsed for a second charging duration. The technical scheme provided by the embodiment of the invention is used for solving the problems of low battery charging speed and low charging efficiency in the low-temperature environment in the prior art.

Description

Battery charging method and device, electronic equipment, adapter and charger

[ technical field ] A method for producing a semiconductor device

The present invention relates to the field of battery technologies, and in particular, to a battery charging method and apparatus, an electronic device, an adapter, and a charger.

[ background of the invention ]

With the development of modern technology, electronic devices have been developed rapidly, and the technology related to the battery, which is the core component of mobile electronic devices, in electronic devices has been developed greatly, and the main development directions thereof include higher energy density and faster charging speed.

At present, most batteries used in electronic equipment are lithium ion batteries, and the lithium ion batteries have the problem of poor charging effect in a low-temperature environment. For example, the battery power is deteriorated, so that the allowable charging current is significantly reduced, limiting it to rapid charging at a large current in a low-temperature environment. Therefore, in the prior art, the magnitude of the charging current of the lithium ion battery at different temperatures is predefined, and the predefined current is used for charging, so as to ensure the safety and the service life of the battery.

[ summary of the invention ]

In view of this, embodiments of the present invention provide a battery charging method and apparatus, an electronic device, an adapter, and a charger, so as to solve the problem in the prior art that a battery charging effect is poor in a low-temperature environment.

In one aspect, an embodiment of the present invention provides a battery charging method, including a first stage and a second stage;

when the initial temperature of the battery is lower than the first rated temperature, the first stage is executed; and after the first stage is finished, executing the second stage;

wherein the first phase comprises: carrying out pulse charging and discharging on the battery to a specified stop condition;

wherein the second phase comprises at least one charging phase, each charging phase comprising at least one charging cycle, each charging cycle comprising: the battery is charged for a first charging duration, and the battery is pulsed for a second charging duration.

Further, the first charging period and the second charging period are configurable.

Further, the first charging time period is longer than the second charging time period; or the first charging time period is less than the second charging time period; or the first charging time period is equal to the second charging time period.

Further, the ratio of the first charging time period to the second charging time period satisfies 1: 1.2.

Further, the sum of the second charging periods of all charging cycles in the second phase is less than or equal to the first charging period of one charging cycle.

Further, charging the battery for a first charging duration in each charging cycle includes: and carrying out constant current charging on the battery for a first charging time period by using constant current.

Further, in the second phase, the constant current used in each charging cycle is equal.

Further, in the second phase, when the voltage of the battery reaches the rated safe charging voltage, switching to the next charging phase;

the constant current used in each charging stage in the second stage is smaller and smaller, and the constant current used in each charging cycle in each charging stage is equal.

Further, the value range of the constant current is 1C to 5C.

Further, the value range of the first charging time period is 0.1 second to 10 seconds.

Further, in each charging cycle of the second stage, a value range of a charging current used when the battery is charged and discharged in a pulse mode is 1.5C to 5C, a value range of a charging time period is 0.1 second to 5 seconds, a value range of a discharging current is 1.5C to 5C, a value range of a discharging time period is 0.1 second to 5 seconds, the charging current is greater than or equal to the discharging current, and the charging time period is greater than or equal to the discharging time period.

Further, the pulse charging and discharging of the battery to the specified stop condition in the first stage comprises at least one charging and discharging cycle, and the parameters used by the charging and discharging cycles are the same;

wherein the parameters include: the pulse charging device comprises pulse charging current, pulse charging time length, pulse discharging current and pulse discharging time length, wherein the pulse charging time length is larger than or equal to the pulse discharging time length, and the pulse charging current is larger than or equal to the pulse discharging current.

Further, the first stage of performing pulse charging and discharging on the battery to a specified stop condition includes at least one pulse charging and discharging stage, each pulse charging and discharging stage includes at least one charging and discharging cycle, parameters used in each pulse charging and discharging stage are different from each other, and the parameters include: pulse charging current, pulse charging duration, pulse discharging current, and pulse discharging duration.

Further, the value range of the pulse charging current is 1.5C to 5C; the value range of the pulse charging time is 0.1 to 15 seconds; the value range of the pulse discharge current is 1.5C to 5C; the pulse discharge time length ranges from 0.1 second to 15 seconds.

Further, the first stage comprises: pulsing charging and discharging of the battery to a specified stop condition in a first manner;

wherein the first mode comprises: the sum of the amplitudes of the charging current and the discharging current in each charging and discharging cycle in the pulse charging and discharging process is equal, and the amplitude of the charging current in each charging and discharging cycle is positively correlated with the charging duration time.

Further, the first stage comprises: pulsing charging and discharging the battery to a specified stop condition in a second manner;

the second mode includes: the amplitudes of the charging current and the discharging current in each charging and discharging cycle in the pulse charging and discharging process are equal, and the amplitude of the charging current in each charging and discharging cycle is positively correlated with the charging duration time.

Further, the method also comprises the following steps: and when the battery is charged for a first charging time period and the voltage of the battery is detected to reach the rated safe charging voltage, stopping the second stage and starting to execute the third stage.

Further, the third stage includes: and carrying out constant voltage charging on the battery until the battery is cut off.

Further, the method also comprises the following steps: stopping the second stage and starting to execute a fourth stage;

the fourth stage includes at least one charging stage, and, after the at least one charging stage, constant-voltage charging the battery to an off-current;

wherein each charging phase of the fourth phases comprises at least one charging cycle, each charging cycle comprising: and carrying out constant current charging on the battery in a third charging time period, and carrying out pulse charging and discharging on the battery in a fourth charging time period.

Further, in the fourth phase, when the voltage of the battery reaches the rated safe charging voltage, switching to the next charging phase;

in the fourth stage, the constant current used in each charging stage is reduced in sequence until the current is reduced to 1C, and the constant current used in each charging cycle in each charging stage is equal.

Further, when the battery is subjected to constant current charging with a current of 1C in the fourth stage, if the battery reaches a cut-off voltage, the step of performing constant voltage charging to the cut-off current on the battery is performed.

Further, the first rated threshold is 15 degrees celsius or 25 degrees celsius.

Further, the specified stop condition is that the charging duration of the pulse charging and discharging phase reaches a specified duration.

Further, the specified stop condition is that the number of charge and discharge cycles in the pulse charge and discharge reaches a specified number.

Further, the specified stop condition is that the temperature of the battery reaches a second rated temperature.

Further, the specified stop condition is that the temperature rise amplitude of the battery reaches a rated temperature amplitude.

Further, the range of the voltage used when the battery is charged at a constant voltage is greater than 4.2V.

Further, the method is applied to the electric equipment using the battery.

Further, the method is applied to an adapter of the battery or a charger of the battery.

On the other hand, an embodiment of the present invention further provides a battery charging method, including: executing a designated phase;

the designated phases include at least one charging phase, each of the charging phases including at least one charging cycle, each of the charging cycles including: the method includes charging a battery for a first charging duration, and pulse charging and discharging the battery for a second charging duration.

Further, the prescribed phase is performed when the temperature of the battery is greater than or equal to a first rated threshold.

Further, the sum of the second charging periods of all charging cycles in the specified phase is less than or equal to the first charging period of one charging cycle.

Further, charging the battery for a first charging duration includes:

and carrying out constant current charging on the battery for a first charging time period by using constant current.

Further, the constant current used in each charging cycle is equal in the designated phase.

Further, in the designated phase, when the voltage of the battery reaches the rated safe charging voltage, switching to the next charging phase; in the designated stage, the constant current used in each charging stage is smaller and smaller, and the constant current used in each charging cycle in each charging stage is equal.

Further, charging the battery for a first charging duration includes:

and carrying out pulse charging and discharging on the battery in a first charging time period.

Further, the value range of the constant current is 1C to 5C.

Further, in each charging cycle of the designated stage, a value range of a charging current used when the battery is charged and discharged in a pulse mode is 1.5C to 5C, a value range of a charging time period is 0.1 second to 5 seconds, a value range of a discharging current is 1.5C to 5C, a value range of a discharging time period is 0.1 second to 5 seconds, the charging current is greater than or equal to the discharging current, and the charging time period is greater than or equal to the discharging time period.

Further, the method further comprises: when the battery is charged for a first charging time period and the voltage of the battery is detected to reach the rated safe charging voltage, the specified stage is stopped, and the battery is charged to the cut-off current at a constant voltage.

Further, the method further comprises:

stopping the designated phase and performing at least one charging phase on the battery, and after the at least one charging phase, performing constant voltage charging on the battery to a cutoff current;

wherein each charging phase comprises at least one charging cycle, each charging cycle comprising: and carrying out constant current charging on the battery in a third charging time period, and carrying out pulse charging and discharging on the battery in a fourth charging time period.

Further, in the at least one charging phase, switching to a next charging phase when the voltage of the battery reaches a rated safe charging voltage;

the constant current used in each charging stage is reduced in sequence until the current is reduced to 1C, and the constant current used in each charging cycle in each charging stage is equal.

Further, when the battery is subjected to constant current charging with a current of 1C, if the battery reaches a cut-off voltage, the step of performing constant voltage charging to the cut-off current on the battery is performed.

Further, the method is applied to the electric equipment using the battery.

In another aspect, an embodiment of the present invention further provides a battery charging apparatus, including:

a first charging unit for performing a first stage when an initial temperature of the battery is less than a first rated temperature; the first stage comprises: carrying out pulse charging and discharging on the battery to a specified stop condition;

the second charging unit is used for executing a second stage after the first stage is finished; the second phase comprises at least one charging phase, each of the charging phases comprising at least one charging cycle, each of the charging cycles comprising: the battery is charged for a first charging duration, and the battery is pulsed for a second charging duration.

Further, the second charging unit is further configured to stop the second stage when the voltage of the battery reaches a rated safe charging voltage when the battery is charged for a first charging duration;

further comprising: and the third charging unit is used for starting to execute the third phase.

Further, the third charging unit is specifically configured to: and carrying out constant voltage charging on the battery until the battery is cut off.

Further, the second charging unit is further configured to stop the second stage;

further comprising: a fourth charging unit for starting to perform a fourth phase, wherein the fourth phase includes at least one charging phase, and after the at least one charging phase, performing constant voltage charging on the battery to an off-current;

wherein each charging phase of the fourth phases comprises at least one charging cycle, each charging cycle comprising: and carrying out constant current charging on the battery in a fourth charging time period, and carrying out pulse charging and discharging on the battery in the fourth charging time period.

a charging unit for performing a designated phase; the designated phases include at least one charging phase, each of the charging phases including at least one charging cycle;

the charging unit further includes:

a first charging module for charging the battery for a first charging duration in each charging cycle;

and the second charging module is used for carrying out pulse charging and discharging on the battery in a second charging time length in each charging cycle.

Further, in the designated phase, when the voltage of the battery reaches the rated safe charging voltage, switching to the next charging phase;

in the designated stage, the constant current used in each charging stage is smaller and smaller, and the constant current used in each charging cycle in each charging stage is equal.

Further, the first charging module is further configured to: stopping the designated stage when detecting that the voltage of the battery reaches a rated safe charging voltage when the battery is charged for a first charging duration;

the charging unit further includes: and the third charging module is used for charging the battery to cut-off current at constant voltage.

Further, the charging unit further includes:

a fourth charging module for stopping the designated stage, performing at least one charging stage on the battery, and performing constant voltage charging on the battery to a cutoff current after the at least one charging stage;

In another aspect, an embodiment of the present invention further provides an electronic device, which includes the above battery charging apparatus.

In another aspect, an embodiment of the present invention further provides a charger, including the above battery charging apparatus.

In another aspect, an embodiment of the present invention further provides a charger, which is characterized by including the above battery charging apparatus.

In another aspect, an embodiment of the present invention further provides an adapter, which is characterized by including the above battery charging apparatus.

One of the above technical solutions has the following beneficial effects:

in the embodiment of the invention, when the temperature of the battery is detected to be lower than a certain temperature, the battery is charged and discharged in a pulse mode, the battery is self-heated, and the battery is charged after the temperature of the battery is raised to a higher temperature, so that the charging effect is improved. Therefore, the problem that the charging effect is poor when the battery is charged in the low-temperature environment in the prior art can be solved. In addition, after the temperature of the battery is raised by pulse charging and discharging, the condition of high-current quick charging can be met, so that the battery can be charged by using larger current, and the charging speed is improved. The problem of low charging efficiency of the battery caused by low-temperature environment is avoided. In addition, the charging is carried out in a mode of carrying out charging at intervals with pulse charging and discharging, so that the temperature of the battery can be maintained in a certain temperature range by utilizing the pulse charging and discharging, the temperature of the battery can be maintained, and the high-current quick charging can be further used.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.

FIG. 1 is a schematic flow chart of a battery charging method according to an embodiment of the present invention;

FIGS. 2(a) and 2(b) are schematic diagrams of temperature detection and transmission provided by embodiments of the present invention;

FIG. 3 is a diagram illustrating an exemplary pulse charging/discharging manner in a first phase according to an embodiment of the present invention;

FIG. 4 is an exemplary diagram of another pulse charging and discharging manner in the first phase according to the embodiment of the invention;

FIGS. 5(a) -5 (c) are schematic diagrams illustrating the current versus the charging duration in the battery charging method according to the embodiment of the present invention;

fig. 6 is a flowchart illustrating one possible implementation method of the battery charging method according to the embodiment of the present invention;

FIG. 7 is a schematic diagram illustrating voltage versus time curves for charging using a pulse charging/discharging method in the battery charging method according to an embodiment of the present invention;

FIG. 8 is a schematic diagram illustrating voltage versus time curves for another pulse charging/discharging method for charging a battery according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of voltage versus time curve characteristics for another pulse charging/discharging method for charging a battery according to an embodiment of the present invention;

FIG. 10 is an exemplary graph of the effect of different charging methods on battery temperature as a function of charging duration provided by embodiments of the present invention;

FIG. 11 is a graphical illustration of the effect of a charging method provided by an embodiment of the present invention on battery temperature;

FIG. 12 is a schematic diagram of a pulse charging and discharging method provided by the prior art;

fig. 13 is a functional block diagram of a battery charging apparatus according to an embodiment of the present invention;

fig. 14 is another functional block diagram of a battery charging apparatus according to an embodiment of the present invention.

[ detailed description ] embodiments

For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.

It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should be understood that although the terms first, second, etc. may be used to describe the charging periods in the embodiments of the present invention, the charging periods should not be limited to these terms. These terms are only used to distinguish the charging periods from each other. For example, the first charging period may also be referred to as the second charging period, and similarly, the second charging period may also be referred to as the first charging period without departing from the scope of embodiments of the present invention.

The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.

Aiming at the problem that the charging efficiency is low because the battery cannot be charged with large current in a low-temperature environment in the prior art, the embodiment of the invention provides a corresponding solution thought: and heating the battery in a low-temperature environment, and then charging the battery.

Guided by this idea, the embodiments of the present invention provide a feasible implementation. When the temperature of the battery is lower than a first rated temperature, the battery is subjected to pulse charging and discharging; and then the battery is charged, and because the temperature of the battery is reduced in the charging process, the charging and the pulse charging and discharging are carried out at intervals, so that the battery can be maintained in a certain temperature range after the temperature is raised, and the charging is carried out.

In the above description, the embodiment of the present invention provides a battery charging method, which at least includes a pulse charging and discharging phase and a hybrid charging phase. The process is shown in figure 1 and comprises:

101. executing a first stage when the initial temperature of the battery in the terminal is less than a first rated temperature; the first stage comprises: and carrying out pulse charging and discharging on the battery to a specified stop condition.

102. And after the pulse charging and discharging stage is finished, executing a second stage. The second phase comprises at least one charging phase, each of said charging phases comprising at least one charging cycle, each charging cycle comprising: the battery is charged for a first charging duration, and the battery is pulsed for a second charging duration.

The battery according to the embodiment of the present invention may be a battery in an electronic device. Battery devices may include, but are not limited to: mobile phones, tablet computers, notebook computers, wearable devices, and the like. The wearable device may include a smart bracelet, smart glasses, or a smart watch, among others.

The main implementation bodies of 101 and 102 are battery charging devices, and the battery charging method and the battery charging device provided by the embodiment of the present invention can be applied to electronic devices using the battery, or can also be applied to adapters of the battery, or can also be applied to chargers of the battery.

In a specific implementation, an initial temperature of the battery may be obtained, and then the initial temperature of the battery is compared with a first rated temperature, and when the initial temperature of the battery is lower than the first rated temperature, step 101, i.e., the first phase, is performed, and then step 102, i.e., the second phase, is performed. Conversely, when the initial temperature of the battery is greater than or equal to the first rated temperature, the first stage may be skipped and the second stage may be directly performed.

Taking the application of the solution to an adapter or a charger as an example, as shown in fig. 2(a), a temperature sensor in the electronic device to which the battery belongs detects an initial temperature of the battery, and then sends the detected initial temperature of the battery to the adapter (or the charger) through a cable with the adapter (or the charger), and the adapter (or the charger) compares the initial temperature of the battery with a first rated temperature, and when the initial temperature is less than the first rated temperature, performs a first stage on the battery, and then performs a second stage; and conversely, when the initial temperature is greater than or equal to the first rated temperature, the battery is directly subjected to the second stage.

Or, for another example, as shown in fig. 2(b), a temperature sensor in the electronic device to which the battery belongs detects the initial temperature of the battery, and then sends the detected initial temperature of the battery to a processor of the electronic device, and the processor compares the initial temperature of the battery with a first rated temperature to obtain a comparison result, and then sends the comparison result to the adapter (or the charger) through a cable with the adapter (or the charger); if the initial temperature of the battery is lower than the first rated temperature as a result of comparison, the adapter (or the charger) performs a first stage on the battery and then performs a second stage; on the contrary, if the initial temperature is greater than or equal to the first rated temperature as a result of the comparison, the adapter (or the charger) directly performs the second stage on the battery.

In the embodiment of the present invention, the initial temperature of the battery refers to the temperature of the battery at the initial charging. For example, when a mobile phone needs to be charged, the temperature of the battery is detected immediately after the mobile phone is plugged into the adapter and connected to the power supply, and the detected temperature of the battery may be referred to as an initial temperature of the battery.

For the implementation of step 101, the embodiment of the present invention provides the following feasible implementation manners, including:

in an embodiment of the invention, the first rated temperature may be 15 degrees celsius or 25 degrees celsius.

It should be noted that, generally, when the initial temperature of the battery is lower than 15 degrees celsius, the environment where the battery is located is considered to be a low-temperature environment, and a large-current fast charging cannot be performed, therefore, in the embodiment of the present invention, based on the principle that pulse charging and discharging may cause a temperature rise of the battery, when it is detected that the initial temperature of the battery is lower than 15 degrees celsius, pulse charging and discharging may be performed on the battery to rapidly raise the temperature of the battery, so that the temperature of the battery can be rapidly raised to a higher temperature after being heated, and thus a temperature condition of a large-current fast charging may be satisfied, so that a large-current fast charging may be performed on the battery, such as a charging process in a.

In addition, the embodiment of the invention can be applied to not only low-temperature environment but also non-low-temperature environment, such as 15 ℃ to 25 ℃. In a certain temperature range, if the temperature is higher, the current used for charging the battery can be larger, so that the charging speed is higher.

In a possible implementation, the pulse charging and discharging of the battery to the specified stop condition in the first stage may include at least one charging and discharging cycle, and the parameters used in each charging and discharging cycle are the same.

Or, in another possible implementation, the pulse charging and discharging to the specified stop condition for the battery in the first stage may also include at least one pulse charging and discharging stage, each pulse charging and discharging stage includes at least one charging and discharging cycle, and parameters used in each pulse charging and discharging stage are different from each other. Each pulse charge-discharge phase may use the temperature as a switching condition, or may also use the number of charge-discharge cycles, or may also use the duration of pulse charge-discharge as a switching condition, and when the switching condition is met, the next pulse charge-discharge phase is switched to, that is: different parameters are used for the pulse charging and discharging process.

For example, taking temperature as an example of the switching condition, when the battery temperature is between [0,5) celsius degrees, pulse charging and discharging are performed by using a first set of parameters, when the battery temperature rises to [5,10) celsius degrees, pulse charging and discharging are performed by using a second set of parameters, and when the battery temperature rises to [10,15) celsius degrees, pulse charging and discharging are performed by using a third set of parameters.

The charging current in the latter parameter set may be greater than or equal to the charging current in the former parameter set, and the discharging current in the latter parameter set may be greater than the discharging current in the former parameter set, may be equal to the discharging current in the former parameter set, or may be smaller than the discharging current in the former parameter set. In different stages, the charging time periods may be equal or unequal, and the discharging time periods may be equal or unequal, which can be understood by those skilled in the art and will not be described herein again.

In the embodiment of the present invention, each pulse charge-discharge phase may include one or more charge-discharge cycles.

In a particular implementation, the parameters include: pulse charging current, pulse charging duration, pulse discharging current, and pulse discharging duration.

In a possible implementation scheme, when the parameters used in each pulse charging and discharging phase are different, the pulse charging duration is greater than or equal to the pulse discharging duration, and the pulse charging current is greater than or equal to the pulse discharging current.

It should be noted that one charge and discharge cycle includes one charge process and one discharge process. In the embodiment of the present invention, in the first charge and discharge cycle in the initial stage, the charging process may be performed first and then the discharging process may be performed, or the discharging process may be performed first and then the charging process may be performed, which is understood by those skilled in the art and will not be described herein again.

In one possible implementation, the range of the pulse charging current in each charge-discharge cycle is 1.5C to 5C, the range of the pulse charging duration in each charge-discharge cycle is 0.1 second to 15 seconds, the range of the pulse discharging current in each charge-discharge cycle is 1.5C to 5C, and the range of the pulse discharging duration in each charge-discharge cycle is 0.1 second to 15 seconds.

In another possible implementation, in the first stage, the following two possible implementation methods may be included: one is to pulse charge and discharge the battery to a specified stop condition in a first manner, and the other is to pulse charge and discharge the battery to a specified stop condition in a second manner.

The first mode includes: the sum of the amplitudes of the charging current and the discharging current in each charging and discharging cycle in the pulse charging and discharging process is equal, and the amplitude of the charging current in each charging and discharging cycle is positively correlated with the charging duration time.

Referring to fig. 3, which is an exemplary diagram of a pulse charging and discharging manner in a first phase according to an embodiment of the present invention, as shown in fig. 3, in the first phase, a sum of amplitudes of a charging current and a discharging current belonging to a same charging and discharging cycle is kept unchanged in the first phase, and the amplitude of the charging current in each charging and discharging cycle is positively correlated with a charging duration, that is, as the charging duration increases, the amplitude of the charging current becomes larger, and the amplitude of the discharging current becomes smaller.

For example, as shown in FIG. 3, the second phase includes four sub-phases. In the sub-stage 1, in each charging and discharging cycle, the charging current is 7500mA, the discharging current is-7500 mA, and the sum of the amplitudes is 15000 mA. In the sub-stage 2, in each charge and discharge cycle, the charge current is 8500mA, the discharge current is-6500 mA, and the sum of the amplitudes is 15000 mA. In the sub-stage 3, in each charge and discharge cycle, the charge current is 9500mA, the discharge current is-5500 mA, and the sum of the amplitudes is 15000 mA; in the sub-stage 4, in each charging and discharging cycle, the charging current is 10500mA, the discharging current is-4500 mA, and the sum of the amplitudes is 15000 mA. In the sub-stage 1 to the sub-stage 4, the sum of the amplitudes of the charging current and the discharging current is 15000mA all the time, the amplitude of the charging current is gradually increased from 7500mA to 11500mA, and the amplitude of the discharging current is gradually decreased from 7500mA to 3500 mA.

Referring to fig. 4, which is an exemplary diagram of another pulse charging and discharging manner in a first phase according to an embodiment of the present invention, as shown in fig. 4, in the first phase, the charging current and the discharging current belonging to the same charging and discharging cycle have equal amplitudes, and the amplitude of the charging current in each charging and discharging cycle is positively correlated with the charging duration in the first phase, and the amplitude of the discharging current in each charging and discharging cycle is positively correlated with the charging duration in the first phase, that is, as the charging duration increases, the amplitude of the charging current increases, and the amplitude of the discharging current also increases.

For example, as shown in FIG. 4, the first phase includes three sub-phases. In the sub-stage 1, in each charging and discharging cycle, the charging current is 7500mA, the discharging current is-7500 mA, and the sum of the amplitudes is 15000 mA; in the sub-stage 2, in each charge-discharge cycle, the charge current is 8500mA, the discharge current is-8500 mA, and the sum of the amplitudes is 17000 mA; in the sub-stage 3, in each charging and discharging cycle, the charging current is 9500mA, the discharging current is-9500 mA, and the sum of the amplitudes is 19000 mA. In the sub-stage 1 to the sub-stage 3, the amplitudes of the charging current and the discharging current are always equal, and along with the increase of the charging duration, the amplitude of the charging current is gradually increased from 7500mA to 9500mA, and the amplitude of the discharging current is also gradually increased from 7500mA to 9500 mA.

In the embodiment of the present invention, the specified stop condition used in the first stage may include the following four possible implementation methods.

In the first stage, the charging duration reaches a specified duration. For example, when the specified time period is 5 minutes, that is, the duration of the charging of the first stage reaches 5 minutes, the first stage of the battery is terminated.

And in the second method, the number of times of the charge and discharge circulation in the first step reaches the specified number. For example, when the specified number of times is 150 times, that is, the number of times of the charge and discharge cycles in the first stage reaches 150 times, the first stage of the battery is terminated.

And thirdly, the temperature of the battery reaches the second rated temperature. For example, the second rated temperature is 20 degrees celsius, that is, in the first stage, when it is detected that the temperature of the battery reaches 20 degrees celsius, the first stage of the battery is terminated. It should be noted that the value of the second rated temperature needs to be less than or equal to 45 ℃. When the battery temperature is too high, for example, over 45 degrees celsius, a large current rapid charging cannot be performed for the safety of the battery.

And fourthly, the temperature rise amplitude of the battery reaches the rated temperature amplitude. For example, the nominal temperature amplitude is 15 degrees celsius, i.e., the first phase is terminated when the battery temperature rise amplitude reaches 15 degrees celsius.

For the implementation of step 102, the embodiment of the present invention provides the following feasible implementation manners, including:

referring to fig. 5(a) to 5(c), which are schematic graphs illustrating current and charging duration in the battery charging method according to the embodiment of the present invention, as shown in fig. 5(a) to 5(c), after the first phase is executed, the second phase is executed. In an embodiment of the present invention, the second phase may include at least one charging phase, each charging phase including at least one charging cycle, each charging cycle including: the battery is charged in a first charging time period, and then the battery is subjected to pulse charging and discharging in a second charging time period.

It should be noted that the last charging cycle in the second stage may be a complete cycle, or may be an incomplete cycle, where the complete cycle refers to charging the battery for the first charging duration and also includes pulse charging and discharging the battery for the second charging duration. An incomplete cycle refers to a cycle that involves charging the battery only for the first charging period, and does not involve pulsing the charging and discharging of the battery for the second charging period.

In the embodiment of the invention, in the second stage, the charging and the pulse charging and discharging can be controlled by utilizing time. In one possible implementation, the first charging duration used for charging and the second charging duration used for pulsed charging and discharging are configurable. For example, the first charging duration and the second charging duration of each charging cycle in the second phase may be configured in advance, and the second phase is implemented according to the configured durations. The first charging time period and the second charging time period can be configured according to the change of the environment temperature of the battery and/or the battery system.

In one possible implementation, the first charging period and the second charging period used in the second stage may include the following three possible implementations.

In the first method, the first charging time period is longer than the second charging time period.

In the second method, the first charging time period is shorter than the second charging time period. For example, the ratio of the first charging period to the second charging period satisfies 1: 1.2.

And in the third method, the first charging time period is equal to the second charging time period.

In another possible embodiment, the cumulative sum of the second charging periods of all charging cycles in the second phase is less than or equal to the first charging period of one charging cycle.

In one possible implementation, the battery may be subjected to constant current charging using a constant current for a first charging period, and, as shown in fig. 5(a) and 5(b), the constant current used in each charging cycle is equal in the second stage, that is, the current used in the constant current charging is kept constant in each charging process of the second stage.

In another possible implementation, in the second phase, when the voltage of the battery reaches the rated safe charging voltage, switching to the next charging phase; furthermore, as shown in fig. 5(c), in the second phase, the constant current used in each charging phase becomes smaller and smaller, and the constant current used in each charging cycle in each charging phase is equal. That is, in the second stage, the constant current used is not constant, and each stage corresponds to one constant current, and the battery is subjected to constant current charging using the corresponding constant current in each stage. For example, in the second stage, the constant current used in each charging stage is 3C, 2.5C, 2C … … in that order. This charging mode will increase the charging speed to some extent, compared to the above-described mode in which the constant current is not changed in the second stage.

In another possible implementation scheme, the battery is also charged and discharged in a pulse mode in the first charging duration, that is, in the second stage of charging, the battery is charged by using the pulse charging and discharging.

In the embodiment of the present invention, the second stage may also set a corresponding stop condition, and when the second stage satisfies the stop condition, the second stage may be terminated.

In a possible implementation, the constant current ranges from 1C to 5C, and the first charging period ranges from 0.1s to 10 s.

In a feasible implementation scheme, in each charging cycle of the second stage, the range of the charging current used for pulse charging and discharging of the battery is 1.5C to 5C, the range of the charging duration is 0.1 second to 5 seconds, the range of the discharging current is 1.5C to 5C, and the range of the discharging duration is 0.1 second to 5 seconds, wherein the charging current is greater than or equal to the discharging current, and the charging duration is greater than or equal to the discharging duration.

For example, the stop condition may include the following two possible implementation methods.

And the charging duration of the first and second stages of the method reaches a specified duration.

And in the second stage of the method, the cycle times of charging and pulse charging and discharging reach the specified times.

It should be noted that, after the temperature of the battery is raised in the first stage, the temperature of the battery can meet the temperature required by the large-current fast charging, and therefore, in the embodiment of the present invention, in the second stage, the battery is charged with a large current for fast charging. For example, the battery is constant current charged in the second stage and the current used may be 3C. Where C in the embodiment of the present invention represents the rated capacity of the battery, for example, when the rated capacity of the battery is 5A, 6C represents six times of the rated capacity, that is, 30A.

In a feasible implementation scheme, when the battery is charged and discharged in a pulse manner in the second charging duration, the charging current in each charging and discharging cycle may be equal to the discharging current, or when the battery is charged and discharged in a pulse manner in the second charging duration, the charging current in each charging and discharging cycle may be greater than the discharging current.

In the second stage, the number of charge and discharge cycles may be equal or may not be equal in each pulse charge and discharge process.

In the embodiment of the invention, after the battery is heated to a higher temperature by pulse charging and discharging, the battery is charged and discharged at intervals in the second stage, wherein the temperature of the battery is reduced during constant-current charging, so that the temperature is increased by using pulse charging and discharging, and the battery can be kept in a higher temperature range by circulating the steps, so that the battery can be rapidly charged with large current, and the problem that the rapid charging with large current cannot be performed due to the lower temperature of the battery is solved.

After step 102, the embodiment of the present invention may further include the following optional implementation schemes:

the first method comprises the following steps: in the case where the constant current used in each charging stage in the second stage is smaller, when the battery is charged for the first charging period, the voltage is detected, and when it is detected that the voltage of the battery reaches the rated safe charging voltage, the second stage is stopped, and the third stage is started to be performed, as shown in fig. 5(b), which includes constant-voltage charging of the battery to the cutoff current. The rated safe charging voltage is determined by a battery system, and the technical solution provided by the embodiment of the present invention can be applied to battery systems using different rated safe charging voltages, and those skilled in the art can understand that the embodiment of the present invention is not particularly limited thereto.

In the embodiment of the invention, after the second stage is finished, the battery can be charged with constant voltage at a constant voltage, and the constant voltage charging is stopped when the battery reaches the cut-off current, so that the charging process of the battery is finished.

For example, the voltage used when constant voltage charging the battery may range from greater than 4.2V.

And the second method comprises the following steps: when the method is applied to the situation that the constant current used in each charging stage in the second stage is smaller and smaller, when the battery is charged for a first charging time period, the voltage is detected, when the voltage of the battery is detected to reach the rated safe charging voltage, the second stage is stopped, and then as shown in fig. 5(a), the battery is charged to the cut-off voltage at a constant current; and, constant voltage charging the battery to an off current.

In a feasible implementation scheme, after the second stage is finished, the battery is subjected to constant current charging by using a constant current, then the constant current charging is stopped when the battery reaches a cut-off voltage, then the battery is subjected to constant voltage charging by using a constant voltage, and the constant voltage charging is stopped when the battery reaches the cut-off current, so that the charging process of the battery is completed.

Or, in another possible implementation, the above process of charging the battery with a constant current to a cut-off voltage may be divided into two stages, that is, the battery is charged with a constant current I first, the constant current charging is stopped when the battery reaches the cut-off voltage V, then the battery is charged with another constant current I ', the constant current charging is stopped when the battery reaches the cut-off voltage V', then the battery is charged with a constant voltage, and the constant voltage charging is stopped when the battery reaches the cut-off voltage, so as to complete the charging process of the battery.

For example, as shown in FIG. 5(a), after the second stage, at a constant current I "₁Constant current charging of a battery to a cut-off voltage V'₁Then with a constant current I "₂Constant current charging of a battery to a cut-off voltage V'₂Then at a constant voltage V "₂Constant voltage charging of the battery to the cut-off current I_end。

And the third is that: stopping the second stage and starting to execute a fourth stage when the constant current used in each charging stage in the second stage is kept unchanged; the fourth stage includes at least one charging stage, and, after the at least one charging stage, constant voltage charging the battery to an off current.

In a particular implementation, each charging phase of the fourth phase comprises at least one charging cycle, each charging cycle comprising: and carrying out constant current charging on the battery in a third charging time period, and carrying out pulse charging and discharging on the battery in a fourth charging time period when the voltage of the battery reaches the rated safe charging voltage.

In a specific implementation, in the fourth phase, when the voltage of the battery reaches the rated safe charging voltage, switching to the next charging phase; in the fourth stage, the constant current used in each charging stage is reduced in sequence until the current is reduced to 1C, and the constant current used in each charging cycle in each charging stage is equal.

In a specific implementation scheme, when the battery is subjected to constant current charging at a current of 1C in the fourth stage, if the battery reaches a cut-off voltage, the step of performing constant voltage charging on the battery to a cut-off current is performed.

It should be noted that, in the last charging cycle in the fourth stage, only the constant current charging of the battery in the third charging period may be included, and the pulse charging and discharging of the battery in the fourth charging period may not be included, so that when the constant current charging of the battery in the current of 1C is performed, the cut-off voltage is reached, and the step of performing the constant voltage charging of the battery to the cut-off current is performed.

Please refer to fig. 6, which is a flowchart illustrating a possible implementation method of the battery charging method according to an embodiment of the present invention, as shown in fig. 6 in conjunction with fig. 5(a), the method includes:

601. the initial temperature of the battery is acquired.

602. The initial temperature of the battery is compared to the first nominal temperature, 603 if the initial temperature of the battery is less than the first nominal temperature, and 605 if the initial temperature of the battery is greater than or equal to the first nominal temperature.

603. The first stage of charging and discharging the battery is to perform pulse charging and discharging.

604. In the process of the first stage, whether the number of times of charge and discharge cycles in pulse charge and discharge reaches a specified number of times M is judged, if yes, 605 is executed, if not, 603 is executed, and the first stage is continued.

605. The battery enters the second phase and

cycles

6051 and 6052.

6051. The battery is charged with at least one current for a first charging period.

6052. And carrying out pulse charging and discharging on the battery in the second charging time period.

6053. In the second stage, it is determined whether the number of cycles of charging and pulse charging and discharging (i.e., the number of cycles of 6051 and 6052) reaches a predetermined number N, if so, 606 is executed, if not, 6051 is executed, and the second stage is continued.

606. At a constant current I'₁Constant current charging of a battery to a cut-off voltage V'₁。

607. At a constant current I'₂Constant current charging of a battery to a cut-off voltage V'₂。

608. At a constant voltage V'₂Constant voltage charging of the battery to the cut-off current I_end。

The following is an example of a specific implementation and effects when the battery is charged by using the above battery charging method.

Please refer to fig. 7 to 9, which are schematic diagrams illustrating voltage and time curves when charging is performed by using three different pulse charging/discharging modes in the battery charging method according to an embodiment of the present invention. In the charging process shown in fig. 7, in the second stage, the first charging period used for constant current charging (the arc line between every two pulse charging and discharging in fig. 7 to 9 represents a constant current charging process) is equal to the second charging period used for pulse charging and discharging. As shown in fig. 7, after the second stage, the battery is subjected to constant-current charging to a cutoff voltage, and then constant-voltage charging to a cutoff current.

In the charging process shown in fig. 8, in the second stage, the first charging time period used for the constant current charging is shorter than the second charging time period used for the pulse charging and discharging. As shown in fig. 8, after the second stage, the battery is subjected to constant-current charging to a cutoff voltage, and then constant-voltage charging to a cutoff current.

In the charging process shown in fig. 9, in the second stage, the first charging period used for the constant-current charging is longer than the second charging period used for the pulse charging and discharging. As shown in fig. 9, after the second stage, the battery is subjected to constant-current charging to a cutoff voltage, and then constant-voltage charging to a cutoff current.

Referring to fig. 10, which is an exemplary diagram illustrating the influence of different charging methods on the temperature of the battery according to the variation of the charging duration according to the embodiment of the present invention, as shown in fig. 10, the charging method used in the second stage of the charging method 1 is the charging method shown in fig. 7, the charging method used in the second stage of the charging method 2 is the hybrid charging method shown in fig. 8, and the charging method used in the second stage of the charging method 3 is the hybrid charging method shown in fig. 9, as can be seen from the comparison in fig. 10, the temperature maintaining time of the battery can be longest by using the charging method shown in fig. 9, the temperature maintaining time of the battery can be shortest by using the charging method shown in fig. 8, and the temperature can be decreased fastest by using the charging method shown in fig. 7.

Referring to fig. 11, which is a schematic diagram of a curve of an influence of a charging method provided in an embodiment of the present invention on a battery temperature, as shown in fig. 11, a line 1 is a variation curve of the battery temperature when a pulse charging and discharging manner is used to perform pulse charging and discharging on the battery in a technical scheme provided by the present invention, and a line 2 is a variation curve of the battery temperature when a pulse charging and discharging manner is used to perform pulse charging and discharging on the battery in a technical scheme provided by the prior art, as shown in fig. 12, a charging current in a first stage may be always constant, and a discharging current may also be always constant. Through the curve shown in fig. 11, in the same time period, compared with the pulse charging and discharging manner in the prior art, the pulse charging and discharging manner used in the first stage provided by the embodiment of the present invention can make the temperature rise of the battery faster, and the raised temperature amplitude is larger, that is, the temperature rise effect of the battery is better, so that the battery can be better ensured to be rapidly charged with a large current after the pulse charging and discharging.

The embodiment of the invention further provides an embodiment of a device for realizing the steps and the method in the embodiment of the method.

Fig. 13 is a functional block diagram of a battery charging apparatus according to an embodiment of the present invention. As shown, the apparatus comprises:

a first charging unit 10 for performing a first stage when an initial temperature of the battery is less than a first rated temperature; the first stage comprises: carrying out pulse charging and discharging on the battery to a specified stop condition;

a second charging unit 20 for executing a second stage after the first stage is completed; the second phase comprises at least one charging phase, each of the charging phases comprising at least one charging cycle, each of the charging cycles comprising: the battery is charged for a first charging duration, and the battery is pulsed for a second charging duration.

In a possible implementation, the second charging unit 20 is further configured to stop the second phase when detecting that the voltage of the battery reaches a rated safe charging voltage when the battery is charged for the first charging duration;

the above-mentioned device still includes: and a third charging unit 30 for starting to perform the third phase.

Further, the third charging unit 30 is specifically configured to: and carrying out constant voltage charging on the battery until the battery is cut off.

In another possible implementation, the second charging unit 20 is further configured to stop the second phase;

the above-mentioned device still includes: a fourth charging unit 40 for starting to perform a fourth phase, wherein the fourth phase includes at least one charging phase, and after the at least one charging phase, the battery is charged to an off-current with a constant voltage; wherein each charging phase of the fourth phases comprises at least one charging cycle, each charging cycle comprising: and carrying out constant current charging on the battery in a fourth charging time period, and carrying out pulse charging and discharging on the battery in the fourth charging time period.

Further, in the fourth phase, when the voltage of the battery reaches the rated safe charging voltage, switching to the next charging phase; in the fourth stage, the constant current used in each charging stage is reduced in sequence until the current is reduced to 1C, and the constant current used in each charging cycle in each charging stage is equal.

Since each unit in the present embodiment can execute the method shown in fig. 1, reference may be made to the related description of fig. 1 for a part of the present embodiment that is not described in detail.

Please refer to fig. 14, which is a block diagram illustrating another exemplary embodiment of a battery charging apparatus according to the present invention. As shown, the apparatus comprises:

a charging unit 100 for performing a designated phase; the designated phases include at least one charging phase, each of the charging phases including at least one charging cycle;

the charging unit 100 further includes:

a first charging module 101 for charging the battery for a first charging duration in each charging cycle;

and the second charging module 102 is used for carrying out pulse charging and discharging on the battery in each charging cycle for a second charging duration.

In a specific implementation, in a specified phase, when the voltage of the battery reaches a rated safe charging voltage, switching to the next charging phase; in the designated stage, the constant current used in each charging stage is smaller and smaller, and the constant current used in each charging cycle in each charging stage is equal.

In one possible implementation, the first charging module 101 is further configured to: stopping the designated stage when detecting that the voltage of the battery reaches a rated safe charging voltage when the battery is charged for a first charging duration;

the charging unit further includes: and the third charging module 103 is used for charging the battery to cut-off current at constant voltage.

In another possible implementation, the charging unit further includes:

a fourth charging module 104, configured to stop the designated phase, perform at least one charging phase on the battery, and perform constant voltage charging on the battery to a cutoff current after the at least one charging phase; wherein each charging phase comprises at least one charging cycle, each charging cycle comprising: and carrying out constant current charging on the battery in a third charging time period, and carrying out pulse charging and discharging on the battery in a fourth charging time period.

Further, in the at least one charging phase, switching to a next charging phase when the voltage of the battery reaches a rated safe charging voltage; the constant current used in each charging stage is reduced in sequence until the current is reduced to 1C, and the constant current used in each charging cycle in each charging stage is equal.

An embodiment of the present invention provides an electronic device including a battery charging apparatus shown in fig. 13.

An embodiment of the present invention further provides an electronic device, which includes the battery charging apparatus shown in fig. 14.

An embodiment of the present invention provides a charger including a battery charging apparatus shown in fig. 13.

An embodiment of the present invention further provides a charger including the battery charging apparatus shown in fig. 14.

An embodiment of the present invention provides an adapter including a battery charging apparatus as shown in fig. 13.

Embodiments of the present invention also provide an adapter including the battery charging apparatus shown in fig. 14.

The technical scheme of the embodiment of the invention has the following beneficial effects:

1. in the embodiment of the invention, when the temperature of the battery is detected to be lower than a certain temperature, the battery is charged and discharged in a pulse mode, the battery is self-heated, the battery is charged after being heated to a higher temperature, and the charging effect is improved, so that the problem that the charging effect is poor when the battery is charged in a low-temperature environment in the prior art can be solved. In addition, after the temperature of the battery is raised by pulse charging and discharging, the condition of high-current quick charging can be met, so that the battery can be charged by using larger current, and the charging speed is improved. The problem of low charging efficiency caused by the fact that the battery cannot be rapidly charged in a low-temperature environment is solved, and the charging efficiency is improved to a certain extent. In addition, in the embodiment of the invention, the charging and the pulse charging and discharging are carried out at intervals, the temperature of the battery is reduced in the second stage of charging process, then the pulse charging and discharging are carried out, the temperature of the battery is raised, and the temperature of the battery can be maintained in the first temperature range by utilizing the pulse charging and discharging repeatedly, so that the temperature of the battery can be maintained, and the quick charging technology can be used for charging. Compared with the prior art that the temperature of the battery is maintained by independently adopting the heat insulation structure, the technical scheme provided by the embodiment of the invention does not need an additional heat insulation structure, thereby saving the implementation cost and improving the implementation efficiency.

2. The charging method realized by the embodiment of the invention can be realized only by improving software in the charging interface without changing an additional hardware structure, and the adjusted charging interface can be matched with a common conventional charger or adapter. Therefore, the technical scheme provided by the embodiment of the invention is easier to realize in practical application and has lower modification cost.

3. The technical scheme provided by the embodiment of the invention can quickly raise the temperature of the battery in a low-temperature environment, so that the battery can be quickly charged with large current, and therefore, the battery can be applied to regions in severe weather, such as northeast China (the average temperature of Harbin is 3.5 ℃ and the average temperature of 1 month is minus 22 ℃), Russia, Canada and other countries in cold weather, has good practicability, and has good use value and significance in practical application.

4. The following two techniques exist in the prior art: the first is that when the battery is in low temperature environment, the battery is heated by pulse charging and discharging mode, and the battery is charged after reaching the specified temperature; the second is that when the automobile power battery is lower than a certain temperature, the automobile power battery is continuously switched between charging and discharging (for example, the charging time is 2 seconds, and the discharging time is 1 second), and if the battery is not lower than the certain temperature, the automobile power battery is normally charged, so that the temperature of the battery is increased along with the charging and discharging processes, the internal resistance of the battery is reduced along with the increase of the temperature, the activity of lithium ions is increased, and the capacity of the battery is increased, so as to avoid the generation of metal lithium.

However, in the first technique, the influence of the ambient temperature on the heated battery is not considered, and the battery temperature is high and the ambient temperature is low, so that the battery is substantially influenced by the low-temperature environment and the temperature is lowered. For example, after the battery is charged and discharged for ten minutes by pulse, the battery temperature will rise, but after the pulse charging and discharging is stopped, the battery temperature will still be influenced by the low temperature environment and will drop, so the heating method in the prior art cannot maintain the battery temperature. However, in the embodiment of the present invention, after the temperature of the battery is raised by the pulse charging and discharging, in the charging process of the second stage, the temperature of the battery is raised by the pulse charging and discharging at intervals, so as to avoid the problem of continuous reduction of the temperature of the battery caused by constant charging, and even if the temperature is reduced by the low-temperature environment during charging, the temperature of the battery is raised by the pulse charging and discharging in time, so that the temperature of the battery can be maintained within a certain range, and the influence of the low-temperature environment on the temperature of the battery is reduced.

In the second technique, in the field of power batteries, the charging current is generally 20A or more, and the national standard specifies that the current is reduced at least at a rate of 20A per second, so that the second technique is not suitable for practical requirements in the case of charging for 2 seconds and discharging for 1 second, for example, when charging for 60A, it takes 3 seconds to reduce the charging current to 0A. Moreover, experiments show that the pulse charging and discharging time length ratio is about 1 to 1, the effect is better, but not 2 to 1 in the second technology, and in the second technology, the switching control between the charging and discharging and the common charging is carried out according to the temperature, but the method is realized by various implementation schemes and does not include the control based on the temperature.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions in actual implementation, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) or a Processor (Processor) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A method of charging a battery, the method comprising a first stage and a second stage;

wherein the second phase comprises at least one charging phase, each charging phase comprising at least one charging cycle, each charging cycle comprising: charging the battery for a first charging duration, and performing pulse charging and discharging on the battery for a second charging duration;

the sum of the second charging time lengths of all charging cycles in the second stage is less than or equal to the first charging time length of one charging cycle;

charging the battery for a first charge duration in each charge cycle, comprising: performing constant current charging on the battery for a first charging time period by using a constant current;

in the second stage, the constant currents used in each charging cycle are equal;

the battery charging method further comprises: stopping the second stage and starting to execute a fourth stage;

wherein each charging phase of the fourth phases comprises at least one charging cycle, each charging cycle comprising: carrying out constant current charging on the battery in a third charging time period, and carrying out pulse charging and discharging on the battery in a fourth charging time period;

in the fourth phase, switching to a next charging phase when the voltage of the battery reaches a rated safe charging voltage;

in the fourth stage, the constant current used in each charging stage is reduced in sequence until the current is reduced to 1C, and the constant current used in each charging cycle in each charging stage is equal;

and when the battery is subjected to constant current charging at the current of 1C in the fourth stage, if the battery reaches a cut-off voltage, performing constant voltage charging on the battery until the battery reaches the cut-off current.

2. The method of claim 1, wherein charging the battery for a first charge duration in each charge cycle comprises: and carrying out pulse charging and discharging on the battery in a first charging time period.

3. The method of claim 1, wherein the constant current has a value in a range of 1C to 5C.

4. The method according to claim 1 or 2, wherein the first charging period has a value in the range of 0.1 to 10 seconds.

5. The method according to claim 1, wherein in each charging cycle of the second stage, the range of charging current used for pulse charging and discharging of the battery is 1.5C to 5C, the range of charging duration is 0.1 second to 5 seconds, the range of discharging current is 1.5C to 5C, the range of discharging duration is 0.1 second to 5 seconds, the charging current is greater than or equal to the discharging current, and the charging duration is greater than or equal to the discharging duration.

6. The method of claim 1, wherein the pulsing charging and discharging of the battery to a specified stop condition in the first phase comprises at least one charge and discharge cycle, each charge and discharge cycle using the same parameters;

7. The method according to claim 1, wherein the first phase of pulse charging and discharging the battery to a specified stop condition comprises at least one pulse charging and discharging phase, each pulse charging and discharging phase comprises at least one charging and discharging cycle, parameters used in each pulse charging and discharging phase are different from each other, and the parameters comprise: pulse charging current, pulse charging duration, pulse discharging current, and pulse discharging duration.

8. The method according to claim 6 or 7,

the value range of the pulse charging current is 1.5C to 5C;

the value range of the pulse charging time is 0.1 to 15 seconds;

the value range of the pulse discharge current is 1.5C to 5C;

the pulse discharge time length ranges from 0.1 second to 15 seconds.

9. The method of claim 1, wherein the first stage comprises: pulsing charging and discharging of the battery to a specified stop condition in a first manner;

10. The method of claim 1, wherein the first stage comprises: pulsing charging and discharging the battery to a specified stop condition in a second manner;

11. The method of claim 1, wherein the first nominal temperature is 15 degrees celsius or 25 degrees celsius.

12. The method of claim 1, wherein the specified stop condition is that a charge duration of the pulsed charge-discharge phase reaches a specified duration.

13. The method according to claim 1, wherein the specified stop condition is that the number of charge and discharge cycles in the pulse charge and discharge reaches a specified number.

14. The method according to claim 1, wherein the specified stop condition is that the temperature of the battery reaches a second rated temperature.

15. The method according to claim 1, wherein the specified stop condition is that a temperature rise amplitude of the battery reaches a rated temperature amplitude.

16. The method of claim 1, wherein the voltage used to charge the battery at a constant voltage is greater than 4.2V.

17. The method according to any one of claims 1 to 16, wherein the method is applied to a consumer using the battery.

18. Method according to any one of claims 1 to 16, characterized in that it is applied on an adapter of the battery or on a charger of the battery.

19. A method of charging a battery, the method comprising: executing a designated phase;

the designated phases include at least one charging phase, each of the charging phases including at least one charging cycle, each of the charging cycles including: charging a battery for a first charging duration, and performing pulse charging and discharging on the battery for a second charging duration;

the sum of the second charging time lengths of all charging cycles in the appointed stage is less than or equal to the first charging time length of one charging cycle;

charging the battery for a first charging duration, comprising: performing constant current charging on the battery for a first charging time period by using a constant current;

in the appointed stage, the constant currents used in all the charging cycles are equal;

the battery charging method further includes:

wherein each charging phase comprises at least one charging cycle, each charging cycle comprising: carrying out constant current charging on the battery in a third charging time period, and carrying out pulse charging and discharging on the battery in a fourth charging time period;

in the at least one charging phase, switching to a next charging phase when the voltage of the battery reaches a rated safe charging voltage;

the constant current used in each charging stage is reduced in sequence until the current is reduced to 1C, and the constant current used in each charging cycle in each charging stage is equal;

and when the battery is subjected to constant current charging at the current of 1C, if the battery reaches a cut-off voltage, performing constant voltage charging on the battery until the battery reaches the cut-off current.

20. The method of claim 19, wherein the designated phase is performed when the temperature of the battery is greater than or equal to a first nominal threshold.

21. The method of claim 19, wherein charging the battery for a first charge duration comprises:

22. The method of claim 19 or 20, wherein the constant current has a value in the range of 1C to 5C.

23. The method of claim 19 or 20, wherein the first charging period ranges from 0.1 to 10 seconds.

24. The method according to claim 19, wherein in each charging cycle of the specified phase, the range of charging current used for pulse charging and discharging the battery is 1.5C to 5C, the range of charging duration is 0.1 second to 5 seconds, the range of discharging current is 1.5C to 5C, the range of discharging duration is 0.1 second to 5 seconds, the charging current is greater than or equal to the discharging current, and the charging duration is greater than or equal to the discharging duration.

25. The method of any one of claims 19 to 24, wherein the method is applied to a powered device using the battery.

26. The method according to any one of claims 19 to 24, wherein the method is applied on an adapter of the battery or on a charger of the battery.

27. A battery charging apparatus, comprising:

the second charging unit is used for executing a second stage after the first stage is finished; the second phase comprises at least one charging phase, each of the charging phases comprising at least one charging cycle, each of the charging cycles comprising: charging the battery for a first charging duration, and performing pulse charging and discharging on the battery for a second charging duration; the sum of the second charging time lengths of all charging cycles in the second stage is less than or equal to the first charging time length of one charging cycle; charging the battery for a first charge duration in each charge cycle, comprising: performing constant current charging on the battery for a first charging time period by using a constant current; in the second stage, the constant currents used in each charging cycle are equal;

the second charging unit is also used for stopping the second stage;

the battery charging apparatus further includes: a fourth charging unit for starting to perform a fourth phase, wherein the fourth phase includes at least one charging phase, and after the at least one charging phase, performing constant voltage charging on the battery to an off-current;

in the fourth stage, the constant current used in each charging stage is reduced in sequence until the current is reduced to 1C, and the constant current used in each charging cycle in each charging stage is equal; and when the battery is subjected to constant current charging at the current of 1C in the fourth stage, if the battery reaches a cut-off voltage, the battery is subjected to constant voltage charging until the cut-off current.

28. A battery charging apparatus, comprising:

the charging unit further includes:

the second charging module is used for carrying out pulse charging and discharging on the battery in each charging cycle for a second charging duration;

the sum of the second charging time lengths of all charging cycles in the designated phase is less than or equal to the first charging time length of one charging cycle;

the charging unit further includes:

the constant current used in each charging stage is reduced in sequence until the current is reduced to 1C, and the constant current used in each charging cycle in each charging stage is equal; and when the battery is subjected to constant current charging with the current of 1C in the charging stage, if the battery reaches cut-off voltage, the battery is subjected to constant voltage charging until the cut-off current.

29. An electronic device comprising the battery charging apparatus according to claim 27.

30. An electronic device comprising the battery charging apparatus according to claim 28.

31. A charger, characterized by comprising the battery charging device according to claim 27.

32. A charger, characterized by comprising the battery charging device according to claim 28.

33. An adapter comprising the battery charging apparatus of claim 27.

34. An adapter comprising the battery charging apparatus of claim 28.