CN107910912B

CN107910912B - Charging circuit and charging method

Info

Publication number: CN107910912B
Application number: CN201711190164.5A
Authority: CN
Inventors: 肖石文; 李龙操
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2017-11-24
Filing date: 2017-11-24
Publication date: 2021-06-08
Anticipated expiration: 2037-11-24
Also published as: CN107910912A

Abstract

The invention provides a charging circuit and a charging method, relates to the technical field of electronics, and solves the problems of long charging time, large charging loss and high charging temperature in the prior art. The charging circuit comprises a charging interface, M groups of battery units, a switch unit and a control unit; the control unit outputs a first control instruction to the switch unit, so that the switch unit controls N1 single batteries of each battery unit in M1 battery units to be connected in series to form an M1 series battery pack, controls a first parallel battery unit formed by connecting M1 series battery packs in parallel to be connected between a charging interface and the ground, and simultaneously outputs a second control instruction to the charger, so that the charger supplies power according to N1 times of battery voltage corresponding to the N1 single batteries. The scheme of the invention enables a plurality of series-connected battery packs to simultaneously carry out high-voltage direct punching, reduces power loss, reduces charging temperature rise of the whole machine, reduces charging time and improves charging efficiency.

Description

Charging circuit and charging method

Technical Field

The present invention relates to the field of electronic technologies, and in particular, to a charging circuit and a charging method.

Background

With the rapid development of science and technology, rapid charging terminals such as smart phones and smart tablet computers are used in large quantities. From the development trend of the quick charging terminals such as smart phones and smart tablet computers, the display screen of the quick charging terminal is larger and larger, the functions of the quick charging terminal are stronger and the processing speed of a Central Processing Unit (CPU) is faster and faster, and the changes can increase the power consumption of the quick charging terminal rapidly. The capacity of the battery equipped for the quick charge terminal must also be larger and larger in order not to affect the standby time.

Currently, in the mobile terminal industry, a single battery is used to perform high-voltage and high-current charging through a charging management IC (Integrated Circuit). When the scheme is used for rapidly charging a single battery of the terminal at high voltage and large current, the charging management ICs are additionally used for carrying out conversion of high-voltage charging and low-voltage power supply, and one charging management IC is used for carrying out high-voltage and low-voltage conversion with at least 5% loss, so that the charging temperature rise of the whole machine is increased, and the service life of devices is reduced. In order to increase the charging current of the battery and reduce the charging time, when 2 charging management ICs are adopted for charging, at least 10% of high-low voltage conversion power loss is generated, so that the charging temperature of the whole machine is rapidly increased. And the charging experience of the user is worse and worse due to the increase of the capacity of the single battery, which increases the charging time of the battery.

Therefore, the current method of rapidly charging a single battery by using a high-voltage large current through a charge management IC has long charging time, large charging loss, and high charging temperature, which affects user experience, and needs to be solved urgently.

Disclosure of Invention

The embodiment of the invention provides a charging circuit and a charging method, which aim to solve the problems of long charging time, large charging loss and high charging temperature of a method for rapidly charging a single battery through a charging management IC in the prior art.

In order to solve the technical problem, the invention is realized as follows: a charging circuit, comprising:

the charging interface is used for being connected with a charger;

m groups of battery units, wherein each group of battery units respectively comprises N single batteries;

the switch unit is arranged on a connection path of each single battery of each group of battery units and is used for controlling any one or more single batteries of each group of battery units to be connected in series to form a series battery pack and controlling a first parallel battery unit formed by any one or more series battery packs to be connected between the charging interface and the ground;

the control unit is respectively connected with the M groups of battery units, the switch unit and the charger and is used for outputting a first control command to the switch unit, so that the switch unit controls N1 battery cells of each group of battery units in M1 groups of battery units to be connected in series to form M1 series battery packs, controls a first parallel battery unit formed by connecting the M1 series battery packs in parallel to be connected between the charging interface and the ground, and simultaneously outputs a second control command to the charger, so that the charger supplies power according to N1 times of battery voltage corresponding to the N1 battery cells;

the charger supports the power supply of battery voltage of any multiple of 1-N times of battery voltage; m, N are integers more than 1, M1 and N1 are integers more than or equal to 1, M1 is less than or equal to M, and N1 is less than or equal to N.

In a first aspect, an embodiment of the present invention further provides a charging method applied to the charging circuit described in any one of the above, where the charging method includes:

detecting preset parameters of each single battery in each group of battery units;

according to the detected preset parameters of each single battery in each group of battery units, outputting a first control instruction to the switch unit, so that the switch unit controls N1 single batteries of each group of battery units in M1 group of battery units to be connected in series to form M1 series battery packs, controls a first parallel battery unit formed by connecting M1 series battery packs in parallel to be connected between the charging interface and the ground, and simultaneously outputs a second control instruction to the charger, so that the charger supplies power according to N1 times of battery voltage corresponding to the N1 single batteries;

In a second aspect, an embodiment of the present invention further provides a mobile terminal, including a processor, a memory, and a computer program stored on the memory and executable on the processor, where the computer program, when executed by the processor, implements the steps of the charging method according to any one of the above.

In a third aspect, the embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the steps of the charging method according to any one of the above.

In the embodiment of the invention, the charging circuit comprises a charging interface, M groups of battery units, a switch unit and a control unit, wherein the charging interface is used for being connected with a charger, the control unit is respectively connected with the switch unit and the charger, and each group of battery units respectively comprises N single batteries; the switch unit is arranged on a connecting path of each single battery of each group of battery units, and can control any one or more single batteries of each group of battery units to be connected in series to form a series battery pack and control a first parallel battery unit formed by any one or more series battery packs to be connected in parallel to be connected between a charging interface and the ground; the control unit is used for outputting a first control instruction to the switch unit, so that the switch unit controls N1 single batteries of each group of the M1 battery units to be connected in series to form M1 series battery packs, and controls a first parallel battery unit consisting of M1 series battery packs connected in parallel to be connected between the charging interface and the ground, meanwhile, a second control instruction is output to the charger, so that the charger supplies power according to the voltage N1 times of the battery corresponding to N1 single batteries, the charger supplies power according to the voltage N1 times of the battery, each series battery pack performs high-voltage direct flushing of the voltage N1 times of the battery, a charging management IC is not needed for conversion from high voltage to low voltage, power loss is reduced, charging temperature rise of the mobile terminal is reduced, and the M1 series battery packs can be charged with high voltage and high current after being connected in parallel, thereby effectively reducing the charging time, improving the charging efficiency and improving the user experience.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments or the prior art 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 that other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a charging circuit according to an embodiment of the present invention;

fig. 2 is another schematic structural diagram of a charging circuit according to an embodiment of the present invention;

fig. 3 is a flowchart of a charging method according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention.

Detailed Description

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 some, not all, embodiments of the present invention. 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.

In some embodiments of the present invention, there is provided a charging circuit, as described with reference to fig. 1, including:

a charging interface 10, wherein the charging interface 10 is used for being connected with a charger 20;

m groups of battery cells 30, each group of battery cells 30 including N single cells 40, respectively;

the switch unit 50 is arranged on a connection path of each single battery 40 of each group of battery units 30 and is used for controlling any one or more single batteries 40 of each group of battery units 30 to be connected in series to form a series battery pack and controlling a first parallel battery unit formed by any one or more series battery packs to be connected between the charging interface 10 and the ground;

and the control unit 60 is respectively connected with the M groups of battery units 30, the switch unit 50 and the charger 20, and is used for outputting a first control command to the switch unit 50, so that the switch unit 50 controls the N1 battery units 40 of each group of battery units 30 in the M1 groups of battery units 30 to be connected in series to form an M1 series battery group, controls the first parallel battery unit formed by connecting the M1 series battery groups in parallel to be connected between the charging interface 10 and the ground, and simultaneously outputs a second control command to the charger 20, so that the charger 20 supplies power according to N1 times of battery voltage corresponding to the N1 battery units 40.

Wherein M, N are integers more than 1, M1 and N1 are integers more than or equal to 1, M1 is less than or equal to M, and N1 is less than or equal to N.

The M1 groups of battery cells 30 are any one or more groups of M groups of battery cells 30, and can be specifically selected according to actual needs. The N1 single batteries 40 are any one or more of the battery units 30 in each group, and can be selected according to actual requirements.

Wherein, the charger 20 supports the power supply of the battery voltage of any multiple of 1 time to N times of the battery voltage. At this time, the charger 20 supports high, medium and low voltage switching output, and if N is 5, the charger 20 supports output power supply of 1 time of battery voltage, 2 times of battery voltage, 3 times of battery voltage, 4 times of battery voltage and 5 times of battery voltage.

It should be noted that fig. 1 shows 2 groups of battery cells 30 and the connection relationship between 2 groups of battery cells 30 and other structural units, but the charging circuit of the embodiment of the present invention is not limited to 2 groups of battery cells 30, that is, the value of M is not limited to 2, and M may be any integer greater than 1, such as 3, 4, 5, and so on. When the value of M is greater than 2, that is, the battery cells 30 include more than 2 groups, other battery cells 30 may be arranged in the manner of arranging 2 groups of battery cells 30 shown in fig. 1.

In addition, it should be noted that, in order to show the connection relationship between the control unit 60 and the 2 groups of battery units more clearly, fig. 1 shows one control unit 60 on each side of the 2 groups of battery units, and the two control units 60 refer to the same control unit 60.

The charging circuit provided by the embodiment of the invention is provided with a plurality of groups of battery units 30 and a switch unit 50 capable of controlling the series-parallel relation of each group of battery units 30, wherein the switch unit 50 is controlled by a control unit 60, so that N1 single cells 40 of each group of battery units 30 in M1 group of battery units 30 are connected in series and then connected in parallel, and the charger 20 is controlled to supply power according to N1 times of battery voltage, so that each series battery group can carry out high-voltage direct current of N1 times of battery voltage, the conversion from high voltage to low voltage is not required to be carried out by a charging management IC, the power loss is reduced, the charging temperature rise of the mobile terminal is reduced, and M1 series battery groups can carry out high-voltage large-current charging simultaneously after being connected in parallel, the charging time is effectively.

The plurality of groups of battery units 30 can be separately placed by avoiding the heating source according to the space of the mobile terminal, so as to further optimize the temperature rise of the whole machine.

Optionally, the switch unit 50 is further configured to control any one or more single batteries 40 of each group of battery units 30 to be connected in parallel to form a parallel battery pack, and control a second parallel battery unit formed by any one or more parallel battery packs to be connected between the charging interface 10 and the ground;

the control unit 60 is further configured to output a third control command to the switch unit 50, so that the switch unit 50 controls N2 battery cells 40 of each group of battery cells 30 in M2 battery cells 30 to be connected in parallel to form M2 parallel battery packs, and controls a second parallel battery cell formed by connecting M2 parallel battery packs in parallel to be connected between the charging interface 10 and the ground, and simultaneously output a fourth control command to the charger 20, so that the charger 20 supplies power according to 1 times of the battery voltage.

Wherein M2 and N2 are integers which are more than or equal to 1, M2 is less than or equal to M, and N2 is less than or equal to N.

The M2 groups of battery cells 30 are any one or more groups of M groups of battery cells 30, and can be specifically selected according to actual needs. The N2 single batteries 40 are any one or more of the battery units 30 in each group, and can be selected according to actual requirements.

At this time, by controlling the N2 cells 40 of each group of cells 30 in the M2 group of cells 30 to be connected in parallel between the charging interface 10 and the ground and controlling the charger 20 to supply power according to the 1-time battery voltage, when the N2 cells 40 are fully charged or other situations occur that the N2 cells 40 need to be charged individually, the N2 cells 40 can be charged at the same time by the 1-time low voltage, thereby further reducing the charging time and improving the charging efficiency.

Specifically, the control unit 60 may detect preset parameters of each single cell 40 in each group of battery units 30 when the mobile terminal is inserted into a charger or charged, such as one or more of the voltage, the current, the internal resistance and the voltage difference between any two single cells 40 in each group of battery units 30, and then control N1 single cells 40 of each group of battery units 30 in M1 group of battery units 30 to be connected in series and then connected in parallel and control the charger 20 to supply power according to N1 times the battery voltage according to the detected preset parameters of each single cell 40 in each group of battery units 30, or control N2 single cells 40 of each group of battery units 30 in M2 group of battery units 30 to be connected in parallel between the charging interface 10 and the ground and control the charger 20 to supply power according to 1 time the battery voltage.

At this moment, because a plurality of batteries are charged in series and parallel connection, the voltage difference and other parameters of each battery can influence the whole charging completion time of the series-parallel battery pack before charging, so that before charging, the voltage, the current and the internal resistance of each battery are detected, the voltage difference and other parameters among the batteries are calculated, and then an optimal voltage charging scheme is determined according to the voltage, the current and the internal resistance of each battery and the voltage difference among the batteries, so that the charging completion time of the whole machine can be reduced, and the user experience is improved.

The battery fault detection method comprises the steps of detecting whether the battery is normal or not through parameters such as current and internal resistance of the battery, and determining the battery fault when the current value or the internal resistance value exceeds a set normal range.

Further, the control unit 60 may output a first control command to the switch unit 50 when it is determined that the voltages of the N1 battery cells 40 of each group of the M1 battery cells 30 are all smaller than a first preset threshold value and the voltage difference between any two battery cells 40 of the N1 battery cells 40 is all smaller than a second preset threshold value, so that the switch unit 50 controls the N1 battery cells 40 of each group of the M1 battery cells 30 to be connected in series to form an M1 series battery pack, controls the first parallel battery cell formed by connecting the M1 series battery packs in parallel to be connected between the charging interface 10 and the ground, and simultaneously outputs a second control command to the charger 20, so that the charger 20 supplies power according to N1 times the battery voltage corresponding to the N1 battery cells 40.

The first preset threshold and the second preset threshold can be set according to actual requirements. For example, the first preset threshold may be 4.1V or 4.2V, and the second preset threshold may be 0.2V, but is not limited thereto.

At this time, when the N1 single cells 40 of the M1 group battery units 30 meet the high-voltage charging requirement, the N1 single cells 40 of each group battery unit 30 in the M1 group battery units 30 are connected in series and then connected in parallel, so that each series battery pack can perform high-voltage direct current of N1 times of battery voltage, a charging management IC is not needed to perform conversion from high voltage to low voltage, power loss is reduced, charging temperature rise of the mobile terminal is reduced, and the M1 series battery packs can perform high-voltage large-current charging simultaneously after being connected in parallel, thereby effectively reducing charging time, improving charging efficiency and improving user experience.

For example, M is 2, N is 5, the first predetermined threshold is 4.1V, and the second predetermined threshold is 0.2V. When the control unit 60 determines that the voltages of 5 single cells 40 of each group of battery units 30 in 2 groups of battery units 30 are all less than 4.1V, and the voltage difference between any two single cells 40 in 5 single cells 40 is less than 0.2V, the control unit controls the 5 single cells 40 of each group of battery units 30 in 2 groups of battery units 30 to be connected in series and then connected in parallel, and controls the charger 20 to supply 5 times of battery voltage, so that each series battery pack can simultaneously perform high-voltage direct current of 5 times of battery voltage, a charging management IC is not required to perform high-voltage to low-voltage conversion, power loss is reduced, charging temperature rise of the mobile terminal is reduced, and the 2 series battery packs can simultaneously perform high-voltage and high-current charging after being connected in parallel, charging time is effectively reduced, charging efficiency is improved, and user experience is improved.

When it is detected that one or more single cells 40 are faulty or are full, the one or more single cells 40 may be removed from the series battery pack, the remaining single cells 40 are connected in series and then connected in parallel, and the charger 20 is controlled to supply power with the battery voltage of the corresponding multiple.

Further, the control unit 60 may output a third control command to the switching unit 50 when it is determined that the voltage of the N2 unit cells 40 of each group of the M2 group of the unit cells 30 is greater than or equal to a first preset threshold value, or the voltage difference between the N2 unit cells 40 and the other unit cells 40 is greater than or equal to a second preset threshold value, so that the switching unit 50 controls the N2 unit cells 40 of each group of the M2 group of the unit cells 30 to be connected in parallel to form M2 parallel battery packs, and controls the second parallel unit cell formed by the M2 parallel battery packs to be connected between the charging interface and the ground, and simultaneously outputs a fourth control command to the charger 20, so that the charger 20 supplies power at 1 time of the battery voltage.

As described above, the first preset threshold and the second preset threshold may be set according to actual requirements. For example, the first preset threshold may be 4.1V or 4.2V, and the second preset threshold may be 0.2V, but is not limited thereto.

At this time, when N2 battery cells 40 are fully charged or when the voltage difference between N2 battery cells 40 is large and separate charging is required, by controlling N2 battery cells 40 of each group of battery cells 30 in the M2 group of battery cells 30 to be connected in parallel between the charging interface 10 and the ground and controlling the charger 20 to supply power according to 1 time of the battery voltage, the N2 battery cells 40 can simultaneously perform low-voltage charging of 1 time of the battery voltage, the charging time is further reduced, and the charging efficiency is improved.

When the control unit 60 determines that the voltage of any one single cell 40 of each group of battery units 30 in the M2 group of battery units 30 is greater than or equal to the first preset threshold, it may output a third control command to the switch unit 50, so that the switch unit 50 controls all the single cells 40 of each group of battery units 30 in the M2 group of battery units 30 to be connected in parallel to form M2 parallel battery groups, controls a second parallel battery unit formed by connecting M2 parallel battery groups in parallel to be connected between the charging interface 10 and the ground, and simultaneously outputs a fourth control command to the charger 20, so that the charger 20 is powered at 1 time of the battery voltage.

At this time, when a certain cell 40 is almost fully charged, the high-voltage large-current charging is stopped, and all the cells 40 of the M2 group of cells 30 are simultaneously charged at a low voltage which is 1 time the cell voltage.

For example, M is 2, N is 5, the first preset threshold is 4.1V, the control unit 60 first controls 5 single cells 40 of each group of battery units 30 in 2 groups of battery units 30 to be connected in series and then connected in parallel, and controls the charger 20 to supply 5 times of battery voltage, so that each group of battery units connected in series can simultaneously perform high-voltage direct current of 5 times of battery voltage, and when it is determined that the voltage of a certain single cell 40 is greater than 4.1V, the control unit controls 5 single cells 40 of 2 groups of battery units 30 to be connected in parallel between the charging interface 10 and the ground, and controls the charger 20 to supply power according to 1 time of battery voltage, so that 5 single cells 40 of each group of battery units 30 can simultaneously perform low-voltage charging of 1 time of battery voltage, thereby further reducing the charging time.

Optionally, as shown in fig. 1, the charging circuit according to the embodiment of the present invention further includes:

a load interface 70, wherein one end of a load 80 of the mobile terminal is connected with the load interface 70, and the other end is grounded;

the switch unit 50 is also used for controlling any one or more single batteries 40 of each group of battery units 30 to be connected between the load interface 70 and the ground;

the control unit 60 is further configured to output a fifth control command to the switch unit 50, so that the switch unit 50 controls the N3 cells 40 of each group of cells 30 in the M3 group of cells 30 to be connected between the load interface 70 and the ground;

wherein M3 and N3 are integers which are more than or equal to 1, M3 is less than or equal to M, and N3 is less than or equal to N.

The M3 groups of battery cells 30 are any one or more groups of M groups of battery cells 30, and can be specifically selected according to actual needs. The N3 single batteries 40 are any one or more of the battery units 30 in each group, and can be selected according to actual requirements.

At this time, by controlling the connection of the one or more battery cells 40 between the load interface 70 and the ground, the one or more battery cells 40 can simultaneously supply power to the load 80.

Specifically, one master battery and N-1 slave batteries may be provided in each group of battery cells 30. As shown in FIG. 1, a group of battery cells 30 includes a master battery A and a slave battery A₁… slave battery A_N-2Slave battery A_N-1The other battery unit 30 includes a master battery B and a slave battery B₁… slave battery B_N-2Slave battery B_N-1. When the charger 20 is controlled to perform a high-voltage charging state of N times of battery voltage (e.g., 5 times of battery voltage), the main battery can be controlled to be connected between the load interface 70 and the ground, i.e., the main battery supplies power to the load 80, so that the large battery can be supplied power to the load through the main battery while high-voltage large-current charging of each battery is ensured, charging time is reduced, and user experience is improved. The slave battery can be both charged and powered when charging is performed at N-1 times the battery voltage, …, 2 times the battery voltage, or 1 times the battery voltage.

When the mobile terminal is in a non-charging state and is in normal use, the control unit 60 may control the switch unit 50, so that all the single cells 40 of each group of battery units 30 are connected between the load interface 70 and the ground, that is, all the single cells 40 simultaneously supply power to the load 80 in parallel, and it can be ensured that in a charging state, voltages of the batteries are substantially the same, and a voltage difference between the batteries is small, so that high-voltage large-current charging is performed, and charging efficiency is improved.

The following illustrates a specific application flow of the embodiment of the present invention.

When the control unit 60 detects that the mobile terminal is inserted into a charger or charged, it may detect the voltage of each single cell 40 in each group of battery units 30 and the voltage difference between any two single cells 40, if the voltage difference between two single cells 40 exceeds a second preset threshold (e.g. 0.2V), then charge the single cells 40 with low voltage individually until the voltage difference between two single cells 40 is less than the second preset threshold, then control all battery units 30, i.e. all single cells 40 of M groups of battery units 30 are connected in series to form M series battery packs, and control M series battery packs to be connected between the charging interface 10 and ground after being connected in parallel, and control the main battery of each group of battery units 30 to be connected between the load interface 70 and ground, and control the charger 20 to supply power with N times of battery voltage, at this time, the M series battery packs are charged with high voltage and high current, and the M main batteries simultaneously power the load 80.

The control unit 60 detects the voltages of the respective slave batteries of each group of the battery cells 30, and when one of the slave batteries exceeds a first preset threshold (e.g., 4.1V), the control unit 60 controls the switching unit 50 to stop the high-voltage large-current charging. The control unit 60 controls all the battery units 30, that is, all the single cells 40 of the M groups of battery units 30 are connected in parallel to form M parallel battery groups, and controls the M parallel battery groups to be connected between the charging interface 10 and the ground after being connected in parallel, and simultaneously controls all the single cells 40 of each group of battery units 30 to be connected between the load interface 70 and the ground, and controls the charger 20 to be switched from high voltage to low voltage (for example, 1 time of battery voltage), and at this time, each single cell 40 is charged with low voltage (1 time of battery voltage) at the same time, and simultaneously supplies power to the load 80 until each battery is fully charged.

In this case, since the main battery is also supplying power to the load when charging, when the load consumes very much power (e.g., a user playing a game), the main battery voltage is not yet charged to a voltage threshold when the battery is charged to a certain voltage threshold (e.g., 4.1V), and thus, only the sub battery voltage needs to be detected.

The detailed structure of the switch unit 50 in the embodiment of the present invention is described below.

Alternatively, as shown in fig. 1, the switch unit 50 includes a first switch structure, a second switch structure, and a third switch structure;

the N single cells 40 of each group of battery units 30 are arranged according to a preset series connection sequence, the positive electrode of a first end single cell 41 of the two single cells 40 at two ends is connected with the charging interface 10, and the negative electrode of a second end single cell 42 is connected with the ground;

the positive electrodes of all the single cells 40 except the first end single cell 41 in each group of the battery units 30 are respectively connected with the negative electrode of the previous single cell 40 through the first switch structure;

the negative poles of all the single cells 40 except the second end single cell 42 in each group of the battery units 30 are respectively connected with the ground through the second switch structure;

the positive electrodes of all the single cells 40 except the first end single cell 41 in each group of the battery units 30 are respectively connected with the charging interface 10 through the third switch structure;

the positive electrode of each single cell 40 in each group of battery cells 30 is connected to the load interface 70 through the third switch structure, respectively.

Wherein, if one master battery and N-1 slave batteries are provided in each set of battery cells 30, as shown in FIG. 1, the slave battery A_N-1And a slave battery B_N-1 First end cells 41 of the two groups of battery cells 30, respectively, and main batteries a and B second end cells 42 of the two groups of battery cells 30, respectively.

In the left group of cells 30, from battery A_N-1The positive pole is connected with the charging interface 10, the negative pole of the main battery A is connected with the ground, except the auxiliary battery A_N-1The positive electrodes of all the other single cells 40 are respectively connected with the negative electrode of the previous single cell 40 through a first switch structure, the negative electrodes of all the single cells 40 except the main battery A are respectively connected with the ground through a second switch structure, and the negative electrodes except the auxiliary battery A_N-1The anodes of all the outer single cells 40 are connected to the charging interface 10 through the third switch structure, and the anode of each single cell 40 is connected to the load interface 70 through the third switch structure.

In the right group of cells 30, slave battery B_N-1The positive electrode is connected with a charging interface 10, and a main battery BIs connected to ground except for the secondary battery B_N-1The positive electrodes of all the other single cells 40 are respectively connected with the negative electrode of the previous single cell 40 through a first switch structure, the negative electrodes of all the single cells 40 except the main battery B are respectively connected with the ground through a second switch structure, and the negative electrodes except the auxiliary battery B_N-1The anodes of all the outer single cells 40 are connected to the charging interface 10 through the third switch structure, and the anode of each single cell 40 is connected to the load interface 70 through the third switch structure.

At this time, the switch unit 50 can control any one or more single cells 40 of each group of battery units 30 to be connected in series to form a series battery pack and control any one or more first parallel battery units formed in parallel between the series battery packs to be connected between the charging interface 10 and the ground, or control any one or more single cells 40 of each group of battery units 30 to be connected in parallel to form a parallel battery pack and control any one or more second parallel battery units formed in parallel between the parallel battery packs to be connected between the charging interface 10 and the ground through the cooperation of the first switch structure, the second switch structure and the third switch structure, and can control any one or more single cells 40 of each group of battery units 30 to be connected between the load interface 70 and the ground through the third switch structure.

Optionally, the first switch structure of each group of battery cells 30 includes: n-1 first switches 31 in one-to-one correspondence with each of the unit cells 40 except for the first end unit cell 41;

the second switching structure of each group of battery cells 30 includes: n-1 second switches 32 in one-to-one correspondence with each of the unit cells 40 except for the second-end unit cell 42;

the third switching structure of each group of the battery cells 30 includes: a third switch 33 and N-1 fourth switches 34 corresponding one-to-one to each of the cells 40 except the first end cell 41, the third switch 33 being connected between the positive electrode of the first end cell 41 and the load interface 70, one end of each of the fourth switches 34 being connected to the positive electrode of the corresponding cell 40, and the other end being connected between the third switch 33 and the load interface 70.

At this time, through the cooperation of the first switch 31, the second switch 32, the third switch 33 and the fourth switch 34, it is possible to control any one or more single cells 40 of each group of battery units 30 to be connected in series to form a series battery pack, and control a first parallel battery unit formed in parallel between any one or more series battery packs to be connected between the charging interface 10 and the ground, or control any one or more single cells 40 of each group of battery units 30 to be connected in parallel to form a parallel battery pack, and control a second parallel battery unit formed in parallel between any one or more parallel battery packs to be connected between the charging interface 10 and the ground, and control any one or more single cells 40 of each group of battery units 30 to be connected between the load interface 70 and the ground through the third switch 33 and the fourth switch 34.

In the left group of cells 30, except from cell A_N-1Each of the other single cells 40 corresponds to one first switch 31, each of the other single cells 40 corresponds to one second switch 32, and each of the other single cells 40 corresponds to one slave battery a_N-1And each of the outer single cells 40 corresponds to one of the fourth switches 34.

Slave battery A_N-1Is connected to the charging interface 10, and the negative pole of the master battery a is connected to ground, except for the slave battery a_N-1The positive electrode of each cell 40 except the first cell 40 is connected to the negative electrode of the previous cell 40 through the corresponding first switch 31, the negative electrode of each cell 40 except the main cell a is connected to the ground through the corresponding second switch 32, and the sub-cell a_N-1Is connected to the load interface 70 via the third switch 33, except from the battery a_N-1The positive electrode of each outer cell 40 is connected between the third switch 33 and the load interface 70 through a corresponding fourth switch 34.

In the right group of cells 30, except from battery B_N-1Each outer single cell 40 corresponds to one first switch 31,One second switch 32 corresponding to each of the unit cells 40 except the master battery B, except the slave battery B_N-1And each of the outer single cells 40 corresponds to one of the fourth switches 34.

Slave battery B_N-1Is connected to the charging interface 10, the negative pole of the master battery a is connected to ground, except for the slave battery B_N-1The positive electrode of each cell 40 except the first cell 40 is connected to the negative electrode of the previous cell 40 through the corresponding first switch 31, the negative electrode of each cell 40 except the main cell B is connected to the ground through the corresponding second switch 32, and the sub-cell B_N-1Is connected to the load interface 70 via the third switch 33, except from the battery B_N-1The positive electrode of each outer cell 40 is connected between the third switch 33 and the load interface 70 through a corresponding fourth switch 34.

Furthermore, N monocells of any two groups of battery units correspond to one another; the switches connected to the corresponding single cells are ganged switches.

At this moment, the switches connected with the single batteries corresponding to each other are linkage switches, so that the single batteries corresponding to each other can be charged at high voltage or low voltage or discharged to a load at the same time, and therefore the voltages of the single batteries corresponding to each other are basically the same in a charging state, the voltage difference between the batteries is small, the charging and discharging between the batteries due to the large voltage difference cannot be caused, the normal charging is influenced, and the charging efficiency is further improved.

For example, as shown in fig. 2, the charging circuit includes 2 sets of battery cells 30, each set including 5 battery cells 40. In the left group of cells 30, from battery A₄Is connected to charging interface 10, and slave battery A₄Is connected to the load interface 70 via switch K25, and is connected from battery a₄Is connected with the ground through a switch K1; slave battery A₃And the slave battery A₄Is connected through a switch K2, and is connected with a secondary battery A₃Is connected between the switch K25 and the load interface 70 through the switch K3, and the slave battery a₃The negative pole of (2) is grounded through a switch K4; slave battery A₂And the slave battery A₃Is connected through a switch K5, and is connected with a secondary battery A₂Anode lead toAn over-switch K6 is connected between the switch K25 and the load interface 70, the slave battery A₂The negative pole of (2) is grounded through a switch K7; slave battery A₁And the slave battery A₂Is connected through a switch K8, and is connected with a secondary battery A₁Is connected between the switch K25 and the load interface 70 through the switch K9, and the slave battery a₁The negative pole of (2) is grounded through a switch K10; positive electrode of main battery A and slave battery A₁The negative electrode of the main battery a is connected through a switch K11, the positive electrode of the main battery a is connected between a switch K25 and the load interface 70 through a switch K12, and the negative electrode of the main battery a is grounded.

In the right group of cells 30, slave battery B₄Is connected to charging interface 10, and slave battery B₄Is connected to the load interface 70 via a switch K25, and is connected from battery B₄Is connected with the ground through a switch K13; slave battery B₃Positive electrode and secondary battery B₄Is connected through a switch K14, and is driven by the battery B₃Is connected between the switch K25 and the load interface 70 through the switch K15, and the slave battery B₃The negative pole of (2) is grounded through a switch K16; slave battery B₂Positive electrode and secondary battery B₃Is connected through a switch K17, and is driven by the battery B₂Is connected between the switch K25 and the load interface 70 through the switch K18, and the slave battery B₂The negative pole of (2) is grounded through a switch K19; slave battery B₁Positive electrode and secondary battery B₂Is connected through a switch K20, and is driven by the battery B₁Is connected between the switch K25 and the load interface 70 through the switch K21, and the slave battery B₁The negative pole of (2) is grounded through a switch K22; positive pole of main battery B and slave battery B₁The negative electrode of the main battery B is connected through a switch K23, the positive electrode of the main battery B is connected between a switch K25 and the load interface 70 through a switch K24, and the negative electrode of the main battery B is grounded.

Wherein, the main battery A, the main battery B and the auxiliary battery A₁And a slave battery B₁Slave battery A₂And a slave battery B₂Slave battery A₃And a slave battery B₃Slave battery A₄And a slave battery B₄And correspond to each other. Switches K1/K13, K2/K14, K3/K15, K4/K16, K5/K17, K6/K18, K7/K19, K8/K20, K9/K21, K10/K22, K9/K2211/K23 and K12/K24 belong to ganged switches. For example, two switches K1/K13, K13 should be open when K1 is open, and K13 should be closed when K1 is closed.

The control unit 60 may control the switches K2/K14, K5/K17, K8/K20, K11/K23, K12/K24 to be closed, the switches K1/K13, K4/K16, K7/K19, K10/K22 to be open, the switches K3/K15, K6/K18, K9/K21, K25 to be open, and control the charger 20 to be powered at 5 times the battery voltage. In this case, the master battery A and the slave battery A₁Slave battery A₂Slave battery A₃And a secondary battery A₄The 5 single batteries are connected in series to form a series battery pack, a main battery B and a slave battery B₁Slave battery B₂Slave battery B₃And a slave battery B₄The 5 single batteries are connected in series to form a series battery pack, two series battery packs are connected between the charging interface 10 and the ground after being connected in parallel, and the two series battery packs are charged at high voltage and large current with 5 times of battery voltage at the same time. Wherein K12/K24 is closed so that the main battery a and the main battery B are connected in parallel between the load interface 70 and the ground, and the main battery a and the main battery B perform low-voltage power supply to the load 80 while performing charging.

When the main battery a and the main battery B are fully charged, the control unit 60 may control the switches K2/K14, K5/K17, K8/K20, K9/K21, and K12/K24 to be closed, the switches K1/K13, K4/K16, K7/K19, and K11/K23 to be opened, the switches K3/K15, K6/K18, and K25 to be opened, the switches K10/K22 to be closed, and control the charger 20 to supply power at 4 times of the battery voltage. At this time, the slave battery A₁Slave battery A₂Slave battery A₃And a secondary battery A₄The 4 single batteries are connected in series to form a series battery pack, and a secondary battery B₁Slave battery B₂Slave battery B₃And a slave battery B₄The 4 single batteries are connected in series to form a series battery pack, two series battery packs are connected between the charging interface 10 and the ground after being connected in parallel, and the two series battery packs are charged with medium-high voltage and large current which is 4 times of the battery voltage at the same time. Among them, the main battery A, the main battery B and the auxiliary battery A₁Slave battery B₁The low-voltage power supply is carried out on the load 80 together, so that when the medium-high voltage large current is charged, the charging channel of the series battery can continuously and quickly charge all the time under the condition of shunting the heavy load large current.

By analogy, charging at 3 times the battery voltage, charging at 2 times the battery voltage, and charging at low voltage (1 time the battery voltage) can be achieved.

However, in the charged state of N1 times the battery voltage (5 times the battery voltage, 4 times the battery voltage, 3 times the battery voltage, 2 times the battery voltage), only N1 cells adjacent to each other are connected in series and charged with N1 times the battery voltage. E.g. at 4 times the battery voltage charge state, may be from battery a₁Slave battery A₂Slave battery A₃And a secondary battery A₄The 4 single batteries are connected in series and then charged with 4 times of battery voltage, or the main battery A and the auxiliary battery A₁Slave battery A₂And a secondary battery A₃The 4 single batteries are charged with 4 times of battery voltage after being connected in series, and cannot be the main battery A or the slave battery A₁Slave battery A₂And a secondary battery A₄Are connected in series.

In the case of low-voltage (1-time battery voltage) charging, all the cells can be charged at low voltage (1-time battery voltage) by switching the switches. Such as when only for slave battery a₄Slave battery B₄When two single batteries are charged, the control unit 60 can control the switches K25 and K1/K13 to be closed, other switches to be opened, and the charger 20 to be switched to charge the battery with 1 time of battery voltage, and then the slave battery A is charged₄Slave battery B₄Charging and from battery A₄Slave battery B₄Collectively supplying power to the load 80. When only for the slave battery A₄Slave battery B₄When two single batteries are charged, the control unit 60 can also control the switches K25, K1/K13, K3/K15, K6/K18, K9/K21 and K12/K24 to be closed, and the slave battery A is supplied with electricity at the moment₄Slave battery B₄And all cells supply power to the load 80 in common.

To sum up, the charging circuit of the embodiment of the present invention is provided with a plurality of groups of battery units 30 and a switch unit 50 capable of controlling the series-parallel relationship of each group of battery units 30, the switch unit 50 is controlled by the control unit 60, so that N1 single cells 40 of each group of battery units 30 in the M1 group of battery units 30 are connected in series and then connected in parallel, and the charger 20 is controlled to supply power according to N1 times of battery voltage, so that each series battery group can perform high-voltage direct current of the N1 times of battery voltage, a charging management IC is not required to perform high-voltage to low-voltage conversion, power loss is reduced, charging temperature rise of the mobile terminal is reduced, and M1 series battery groups can perform high-voltage large-current charging simultaneously after being connected in parallel, thereby effectively reducing charging time, improving charging efficiency.

In some embodiments of the present invention, there is also provided a charging method applied to the charging circuit described in the above embodiments, and referring to fig. 3, the charging method includes:

step 301, detecting preset parameters of each single battery in each group of battery units;

step 302, outputting a first control command to a switch unit according to the detected preset parameters of each single battery in each group of battery units, so that the switch unit controls N1 single batteries in each group of battery units in M1 group of battery units to be connected in series to form M1 series battery packs, controls a first parallel battery unit formed by connecting M1 series battery packs in parallel to be connected between the charging interface and the ground, and simultaneously outputs a second control command to the charger, so that the charger supplies power according to N1 times of battery voltage corresponding to the N1 single batteries;

According to the charging method provided by the embodiment of the invention, the switch unit is controlled to enable N1 single batteries of each battery unit in M1 battery units to be connected in series and then connected in parallel, and the charger is controlled to supply power according to N1 times of battery voltage, so that each series battery pack can carry out high-voltage direct flushing of N1 times of battery voltage, a charging management IC (integrated circuit) is not required to carry out conversion from high voltage to low voltage, the power loss is reduced, the charging temperature rise of the mobile terminal is reduced, and the M1 series battery packs can carry out high-voltage large-current charging simultaneously after being connected in parallel, so that the charging time is effectively reduced, the charging efficiency is improved, and the user.

Optionally, after step 301, the method further includes:

step 303, outputting a third control instruction to the switch unit according to the detected preset parameter of each single battery in each group of battery units, so that the switch unit controls N2 single batteries of each group of battery units in M2 groups of battery units to be connected in parallel to form M2 parallel battery groups, controls a second parallel battery unit formed by connecting M2 parallel battery groups in parallel to be connected between the charging interface and the ground, and simultaneously outputs a fourth control instruction to the charger, so that the charger supplies power according to 1 time of battery voltage;

Specifically, the step 301 includes:

step 3011, detecting one or more of a voltage, a current, an internal resistance, and a voltage difference between any two single cells in each group of battery units.

At this moment, because a plurality of batteries are charged in series and parallel connection, the voltage difference and other parameters of each battery can influence the whole charging completion time of the series-parallel battery pack before charging, so that the voltage, the current, the internal resistance of each battery and the voltage difference and other parameters between batteries are detected and calculated before charging, the subsequent determination of an optimal voltage charging scheme according to the voltage, the current, the internal resistance of each battery and the voltage difference and other parameters between batteries is facilitated, the charging completion time of the whole machine can be reduced, and the user experience is improved.

Further, when detecting the voltage of each battery cell in each group of battery units and the voltage difference between any two battery cells, the step 302 includes:

step 3021, when the voltages of N1 single batteries of each group of battery units in the M1 group of battery units are all smaller than a first preset threshold value, and the voltage difference between any two single batteries in the N1 group of battery units is all smaller than a second preset threshold value, outputting a first control command to the switch unit, so that the switch unit controls N1 single batteries of each group of battery units in the M1 group of battery units to be connected in series to form an M1 series battery pack, controls a first parallel battery unit formed by connecting the M1 series battery packs in parallel to be connected between the charging interface and the ground, and simultaneously outputs a second control command to the charger, so that the charger supplies power according to N1 times of battery voltage corresponding to the N1 single batteries.

At the moment, when N1 single batteries of M1 group battery units meet the high-voltage charging requirement, N1 single batteries of each group battery unit in the M1 group battery units are connected in series and then connected in parallel, so that each series battery pack can carry out high-voltage direct flushing of N1 times of battery voltage, a charging management IC (integrated circuit) is not needed to carry out conversion from high voltage to low voltage, the power loss is reduced, the charging temperature rise of the mobile terminal is reduced, and the M1 series battery packs can be charged with high voltage and large current simultaneously after being connected in parallel, thereby effectively reducing the charging time, improving the charging efficiency and improving the user experience.

For example, M is 2, N is 5, the first predetermined threshold is 4.1V, and the second predetermined threshold is 0.2V. When it is determined that the voltages of 5 monocells of each group of battery units in 2 groups of battery units are all smaller than 4.1V, and the voltage difference between any two monocells in the 5 monocells is smaller than 0.2V, the 5 monocells of each group of battery units in 2 groups of battery units are controlled to be connected in parallel after being connected in series, and the charger is controlled to supply 5 times of battery voltage, so that each series battery pack can be directly charged at the high voltage of 5 times of battery voltage at the same time, the charging management IC is not needed to convert the high voltage into the low voltage, the power loss is reduced, the charging temperature rise of the mobile terminal is reduced, and the 2 series battery packs can be charged at the high voltage and the high current at the same time after being connected in parallel, the charging time is effectively reduced, the.

When one or more single batteries are detected to be in fault or to be fully charged, the single battery or the single batteries can be removed from the series battery pack, the rest single batteries are connected in series and then connected in parallel, and the charger is controlled to supply power with battery voltage of corresponding multiple.

The above step 303 includes:

step 3031, when the voltage of the N2 single cells of each group of the M2 group of the battery units is greater than or equal to the first preset threshold value, or the voltage difference between the N2 single cells and other single cells is greater than or equal to the second preset threshold value, outputting a third control command to the switch unit, so that the switch unit controls the N2 single cells of each group of the M2 group of the battery units to be connected in parallel to form an M2 parallel battery pack, controls the second parallel battery unit formed by the M2 parallel battery packs to be connected between the charging interface and the ground, and simultaneously outputting a fourth control command to the charger, so that the charger supplies power according to 1-time battery voltage.

When the voltage of any single battery in each group of battery units in the M2 groups of battery units is detected to be greater than or equal to the first preset threshold value, a third control command can be output to the switch unit, so that the switch unit controls all single batteries in each group of battery units in the M2 groups of battery units to be connected in parallel to form M2 parallel battery groups, controls a second parallel battery unit formed by connecting M2 parallel battery groups in parallel to be connected between a charging interface and the ground, and simultaneously outputs a fourth control command to the charger, so that the charger supplies power according to 1 time of the battery voltage.

At this time, when a certain cell is almost fully charged, the high-voltage large-current charging is stopped, and all the cells of the M2 group battery unit are simultaneously charged at a low voltage which is 1 time the battery voltage.

For example, M is 2, N is 5, the first preset threshold is 4.1V, first, 5 cells of each group of cells in 2 groups of cells are controlled to be connected in series and then connected in parallel, and the charger is controlled to supply 5 times of cell voltage, so that each group of cells connected in series can simultaneously perform high-voltage direct current of 5 times of cell voltage, when it is determined that the voltage of a certain cell is greater than 4.1V, 5 cells of 2 groups of cells are controlled to be connected in parallel between the charging interface and the ground, and the charger is controlled to supply power according to 1 time of cell voltage, so that 5 cells of each group of cells can simultaneously perform low-voltage charging of 1 time of cell voltage, thereby further reducing charging time.

Optionally, the charging method further includes:

step 304, outputting a fifth control instruction to the switch unit, so that the switch unit controls N3 single batteries of each group of M3 battery units to be connected between a load interface and the ground;

At this time, one or more battery cells are connected between the load interface and the ground by controlling the one or more battery cells to supply power to the load at the same time.

Specifically, one master battery and N-1 slave batteries may be provided in each group of battery cells. As shown in FIG. 1, a group of battery cells 30 includes a master battery A and a slave battery A₁… slave battery A_N-2Slave battery A_N-1The other battery unit 30 includes a master battery B and a slave battery B₁… slave battery B_N-2Slave battery B_N-1. When the charger 20 is controlled to perform a high-voltage charging state of N times of battery voltage (e.g., 5 times of battery voltage), the main battery can be controlled to be connected between the load interface 70 and the ground, i.e., the main battery supplies power to the load 80, so that the large battery can be supplied power to the load 80 through the main battery while high-voltage large-current charging of each battery is ensured, charging time is reduced, and user experience is improved. When the voltage N-1 times of the battery is carried out,…, 2 times battery voltage or 1 times battery voltage, the secondary battery can be charged and powered.

Fig. 4 is a schematic diagram of a hardware structure of a mobile terminal implementing various embodiments of the present invention. The mobile terminal 400 includes, but is not limited to: radio frequency unit 401, network module 402, audio output unit 403, input unit 404, sensor 405, display unit 406, user input unit 407, interface unit 408, memory 409, processor 410, and power supply 411. Those skilled in the art will appreciate that the mobile terminal architecture shown in fig. 4 is not intended to be limiting of mobile terminals, and that a mobile terminal may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the mobile terminal includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.

The interface unit 408 includes a charging interface, and the charging interface is used for connecting with a charger; the power supply 411 includes M sets of battery cells, each set including N cells, respectively; the mobile terminal 400 further includes a switch unit disposed on a connection path of each battery cell of each group of battery cells, for controlling any one or more battery cells of each group of battery cells to be connected in series to form a series battery pack, and controlling a first parallel battery cell formed by any one or more series battery packs to be connected in parallel to be connected between the charging interface and the ground; the charger supports the power supply of battery voltage of any multiple of 1-N times of battery voltage; m, N are each integers greater than 1.

The switch unit is also used for controlling any one or more single batteries of each group of battery units to be connected in parallel to form a parallel battery pack, and controlling a second parallel battery unit formed by any one or more parallel battery packs to be connected between the charging interface and the ground.

The interface unit 408 further includes a load interface, one end of a load of the mobile terminal is connected to the load interface, and the other end is grounded; the switch unit is also used for controlling any one or more single batteries of each group of battery units to be connected between the load interface and the ground.

Wherein the switch unit comprises a first switch structure, a second switch structure and a third switch structure; the N single batteries of each group of battery units are arranged according to a preset series connection sequence, the positive electrode of the first end single battery of the two single batteries at the two ends is connected with the charging interface, and the negative electrode of the second end single battery is connected with the ground; the positive electrodes of all the single batteries except the first end single battery in each group of battery units are respectively connected with the negative electrode of the previous single battery through the first switch structure; the negative electrodes of all the single batteries except the second end single battery in each group of battery units are respectively connected with the ground through the second switch structure; the positive electrodes of all the single batteries except the first end single battery in each group of battery units are respectively connected with the charging interface through the third switch structure; and the positive electrode of each single battery in each group of battery units is respectively connected with the load interface through the third switch structure.

Wherein, the first switch structure of each group of battery units includes: n-1 first switches in one-to-one correspondence with each of the single cells except for the first-end single cell; the second switch structure of each group of battery cells includes: n-1 second switches in one-to-one correspondence with each of the single cells except for the second-end single cell; the third switch structure of each group of the battery cells includes: the battery pack comprises a first end single battery, a second end single battery, a third switch and N-1 fourth switches, wherein the N-1 fourth switches correspond to the single batteries except the first end single battery one by one, the third switch is connected between the positive electrode of the first end single battery and the load interface, one end of each fourth switch is connected with the positive electrode of the corresponding single battery, and the other end of each fourth switch is connected between the third switch and the load interface.

N monocells of any two groups of battery units correspond to one another; the switches connected to the corresponding single cells are ganged switches.

The processor 410 is used for detecting preset parameters of each single battery in each group of battery units; according to the detected preset parameters of each single battery in each group of battery units, outputting a first control instruction to the switch unit, so that the switch unit controls N1 single batteries of each group of battery units in M1 group of battery units to be connected in series to form M1 series battery packs, controls a first parallel battery unit formed by connecting M1 series battery packs in parallel to be connected between the charging interface and the ground, and simultaneously outputs a second control instruction to the charger, so that the charger supplies power according to N1 times of battery voltage corresponding to the N1 single batteries; the charger supports the power supply of battery voltage of any multiple of 1-N times of battery voltage; m, N are integers more than 1, M1 and N1 are integers more than or equal to 1, M1 is less than or equal to M, and N1 is less than or equal to N.

This mobile terminal 400 makes N1 monocells of every group battery unit connect in series and connect in parallel again in M1 group battery unit through the control switch unit to control the charger and supply power according to N1 times battery voltage, make every series battery group can carry out the high-pressure direct flushing of N1 times battery voltage, it carries out high pressure to low pressure conversion to need not the charge management IC, power loss has been reduced, mobile terminal's the temperature rise that charges has been reduced, and can carry out high-pressure heavy current simultaneously and charge after M1 series battery group connects in parallel, effectively reduced the charge time, charging efficiency is improved, user experience has been improved.

Optionally, the processor 410 is further configured to output a third control command to the switch unit according to the detected preset parameter of each battery cell in each group of battery cells, so that the switch unit controls N2 battery cells of each group of battery cells in M2 groups of battery cells to be connected in parallel to form M2 parallel battery packs, controls a second parallel battery cell formed by connecting M2 parallel battery packs in parallel to be connected between the charging interface and the ground, and simultaneously outputs a fourth control command to the charger, so that the charger supplies power according to 1 time of battery voltage; wherein M2 and N2 are integers which are more than or equal to 1, M2 is less than or equal to M, and N2 is less than or equal to N.

Optionally, the processor 410 is further configured to detect one or more of a voltage, a current, an internal resistance, and a voltage difference between any two battery cells of each group of battery cells.

Optionally, when detecting the voltage of each battery cell in each group of battery cells and the voltage difference between any two battery cells, if the voltages of N1 battery cells of each group of battery cells in M1 group of battery cells are all smaller than a first preset threshold value, and the voltage difference between any two battery cells in N1 battery cells is smaller than a second preset threshold value, the processor 410 is further configured to output a first control instruction to the switch unit, so that the switch unit controls N1 battery cells of each group of battery cells in M1 group of battery cells to be connected in series to form M1 series battery packs, and controls a first parallel battery cell formed by the M1 series battery packs to be connected between the charging interface and the ground, and simultaneously outputs a second control instruction to the charger, so that the charger supplies power according to N1 times the battery voltage corresponding to the N1 battery cells; when the voltage of N2 single batteries of each group of battery units in M2 group of battery units is larger than or equal to the first preset threshold value, or the voltage difference between N2 single batteries and other single batteries is larger than or equal to the second preset threshold value, outputting a third control instruction to the switch unit, so that the switch unit controls N2 single batteries of each group of battery units in M2 group of battery units to be connected in parallel to form M2 parallel battery packs, controls a second parallel battery unit formed by connecting M2 parallel battery packs in parallel to be connected between the charging interface and the ground, and simultaneously outputting a fourth control instruction to the charger, so that the charger supplies power according to 1 time of battery voltage.

Optionally, the processor 410 is further configured to output a fifth control instruction to the switch unit, so that the switch unit controls N3 cells of each group of M3 battery cells to be connected between the load interface and the ground; wherein M3 and N3 are integers which are more than or equal to 1, M3 is less than or equal to M, and N3 is less than or equal to N.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 401 may be used for receiving and sending signals during a message sending and receiving process or a call process, and specifically, receives downlink data from a base station and then processes the received downlink data to the processor 410; in addition, the uplink data is transmitted to the base station. Typically, radio unit 401 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. Further, the radio unit 401 can also communicate with a network and other devices through a wireless communication system.

The mobile terminal provides the user with wireless broadband internet access through the network module 402, such as helping the user send and receive e-mails, browse web pages, and access streaming media.

The audio output unit 403 may convert audio data received by the radio frequency unit 401 or the network module 402 or stored in the memory 409 into an audio signal and output as sound. Also, the audio output unit 403 may also provide audio output related to a specific function performed by the mobile terminal 400 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 403 includes a speaker, a buzzer, a receiver, and the like.

The input unit 404 is used to receive audio or video signals. The input Unit 404 may include a Graphics Processing Unit (GPU) 4041 and a microphone 4042, and the Graphics processor 4041 processes image data of a still picture or video obtained by an image capturing apparatus (such as a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 406. The image frames processed by the graphic processor 4041 may be stored in the memory 409 (or other storage medium) or transmitted via the radio frequency unit 401 or the network module 402. The microphone 4042 may receive sound, and may be capable of processing such sound into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 401 in case of the phone call mode.

The mobile terminal 400 also includes at least one sensor 405, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 4061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 4061 and/or the backlight when the mobile terminal 400 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the posture of the mobile terminal (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), and vibration identification related functions (such as pedometer, tapping); the sensors 405 may also include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, etc., which will not be described in detail herein.

The display unit 406 is used to display information input by the user or information provided to the user. The Display unit 406 may include a Display panel 4061, and the Display panel 4061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 407 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the mobile terminal. Specifically, the user input unit 407 includes a touch panel 4071 and other input devices 4072. Touch panel 4071, also referred to as a touch screen, may collect touch operations by a user on or near it (e.g., operations by a user on or near touch panel 4071 using a finger, a stylus, or any suitable object or attachment). The touch panel 4071 may include two parts, a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 410, receives a command from the processor 410, and executes the command. In addition, the touch panel 4071 can be implemented by using various types such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 4071, the user input unit 407 may include other input devices 4072. Specifically, the other input devices 4072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a track ball, a mouse, and a joystick, which are not described herein again.

Further, the touch panel 4071 can be overlaid on the display panel 4061, and when the touch panel 4071 detects a touch operation thereon or nearby, the touch operation is transmitted to the processor 410 to determine the type of the touch event, and then the processor 410 provides a corresponding visual output on the display panel 4061 according to the type of the touch event. Although in fig. 4, the touch panel 4071 and the display panel 4061 are two separate components to implement the input and output functions of the mobile terminal, in some embodiments, the touch panel 4071 and the display panel 4061 may be integrated to implement the input and output functions of the mobile terminal, which is not limited herein.

The interface unit 408 is an interface through which an external device is connected to the mobile terminal 400. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 408 may be used to receive input (e.g., data information, power, etc.) from external devices and transmit the received input to one or more elements within the mobile terminal 400 or may be used to transmit data between the mobile terminal 400 and external devices.

The memory 409 may be used to store software programs as well as various data. The memory 409 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 409 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 410 is a control center of the mobile terminal, connects various parts of the entire mobile terminal using various interfaces and lines, and performs various functions of the mobile terminal and processes data by operating or executing software programs and/or modules stored in the memory 409 and calling data stored in the memory 409, thereby integrally monitoring the mobile terminal. Processor 410 may include one or more processing units; preferably, the processor 410 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 410.

The mobile terminal 400 may further include a power supply 411 (e.g., a battery) for supplying power to various components, and preferably, the power supply 411 may be logically connected to the processor 410 through a power management system, so as to implement functions of managing charging, discharging, and power consumption through the power management system.

In addition, the mobile terminal 400 includes some functional modules that are not shown, and thus, are not described in detail herein.

Preferably, an embodiment of the present invention further provides a mobile terminal, which includes a processor 410, a memory 409, and a computer program that is stored in the memory 409 and can be run on the processor 410, and when being executed by the processor 410, the computer program implements each process of the charging method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not described here again.

The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the charging method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A charging circuit, comprising:

the charging interface is used for being connected with a charger;

the charger supports the power supply of battery voltage of any multiple of 1-N times of battery voltage; m, N are integers more than 1, M1 and N1 are integers more than or equal to 1, M1 is less than or equal to M, and N1 is less than N;

the N monocells of any two groups of battery units correspond to one another, and switches connected with the corresponding monocells are linkage switches;

the charging circuit further includes: one end of a load of the mobile terminal is connected with the load interface, and the other end of the load of the mobile terminal is grounded;

the switch unit comprises a first switch structure, a second switch structure and a third switch structure;

the N single batteries of each group of battery units are arranged according to a preset series connection sequence, the positive electrode of the first end single battery of the two single batteries at the two ends is connected with the charging interface, and the negative electrode of the second end single battery is connected with the ground;

the positive electrodes of all the single batteries except the first end single battery in each group of battery units are respectively connected with the negative electrode of the previous single battery through the first switch structure;

the negative electrodes of all the single batteries except the second end single battery in each group of battery units are respectively connected with the ground through the second switch structure;

the positive electrodes of all the single batteries except the first end single battery in each group of battery units are respectively connected with the charging interface through the third switch structure;

and the positive electrode of each single battery in each group of battery units is respectively connected with the load interface through the third switch structure.

2. The charging circuit according to claim 1, wherein the switching unit is further configured to control any one or more single batteries of each group of battery units to be connected in parallel to form a parallel battery pack, and control a second parallel battery unit formed by any one or more parallel battery packs to be connected between the charging interface and the ground;

the control unit is further used for outputting a third control instruction to the switch unit, so that the switch unit controls N2 single batteries of each group of battery units in M2 groups of battery units to be connected in parallel to form M2 parallel battery packs, controls a second parallel battery unit formed by connecting M2 parallel battery packs in parallel to be connected between the charging interface and the ground, and simultaneously outputs a fourth control instruction to the charger, so that the charger supplies power according to 1 time of battery voltage;

3. The charging circuit according to claim 1 or 2,

the switch unit is also used for controlling any one or more single batteries of each group of battery units to be connected between the load interface and the ground;

the control unit is further used for outputting a fifth control instruction to the switch unit, so that the switch unit controls N3 single batteries of each group of M3 battery units to be connected between the load interface and the ground;

4. A charging circuit as claimed in claim 1 or 2, wherein the first switching arrangement of each group of cells comprises: n-1 first switches in one-to-one correspondence with each of the single cells except for the first-end single cell;

the second switch structure of each group of battery cells includes: n-1 second switches in one-to-one correspondence with each of the single cells except for the second-end single cell;

the third switch structure of each group of the battery cells includes: the battery pack comprises a first end single battery, a second end single battery, a third switch and N-1 fourth switches, wherein the N-1 fourth switches correspond to the single batteries except the first end single battery one by one, the third switch is connected between the positive electrode of the first end single battery and the load interface, one end of each fourth switch is connected with the positive electrode of the corresponding single battery, and the other end of each fourth switch is connected between the third switch and the load interface.

5. A charging method applied to the charging circuit according to any one of claims 1 to 4, the charging method comprising:

the charger supports the power supply of battery voltage of any multiple of 1-N times of battery voltage; m, N are integers more than 1, M1 and N1 are integers more than or equal to 1, M1 is less than or equal to M, and N1 is less than N.

6. The charging method according to claim 5, wherein after detecting the preset parameter of each single battery in each group of battery units, the method further comprises:

according to the detected preset parameters of each single battery in each group of battery units, outputting a third control instruction to the switch unit, so that the switch unit controls N2 single batteries of each group of battery units in M2 group of battery units to be connected in parallel to form M2 parallel battery groups, controls a second parallel battery unit formed by connecting M2 parallel battery groups in parallel to be connected between the charging interface and the ground, and simultaneously outputs a fourth control instruction to the charger, so that the charger supplies power according to 1 time of battery voltage;

7. A charging method as claimed in claim 6, wherein the step of detecting the preset parameter of each battery cell in each group of battery cells comprises:

one or more of the voltage, the current, the internal resistance, and the voltage difference between any two cells of each cell in each group of cells is detected.

8. The charging method according to claim 7, wherein when detecting the voltage of each cell in each group of cells and the voltage difference between any two cells, the step of outputting a first control command to the switch unit according to the detected preset parameter of each cell in each group of cells, so that the switch unit controls N1 cells of each group of cells in M1 group of cells to be connected in series to form M1 series battery packs, and controls a first parallel cell formed by connecting the M1 series battery packs in parallel to be connected between the charging interface and the ground, and simultaneously outputs a second control command to the charger, so that the charger supplies power according to N1 times of the cell voltage corresponding to the N1 cells comprises the steps of:

under the condition that the voltages of N1 single batteries of each group of battery units in M1 groups of battery units are all smaller than a first preset threshold value, and the voltage difference between any two single batteries in N1 single batteries is smaller than a second preset threshold value, outputting a first control instruction to the switch unit, so that the switch unit controls N1 single batteries of each group of battery units in M1 groups of battery units to be connected in series to form M1 series battery packs, controls a first parallel battery unit formed by connecting M1 series battery packs in parallel to be connected between the charging interface and the ground, and simultaneously outputs a second control instruction to the charger, so that the charger supplies power according to N1 times of battery voltage corresponding to the N1 single batteries;

the step of outputting a third control command to the switch unit according to the detected preset parameter of each battery cell in each group of battery cells, so that the switch unit controls N2 battery cells of each group of battery cells in M2 group of battery cells to be connected in parallel to form M2 parallel battery packs, and controls a second parallel battery cell formed by connecting M2 parallel battery packs in parallel to be connected between the charging interface and the ground, and simultaneously outputting a fourth control command to the charger, so that the charger supplies power according to 1 time of battery voltage comprises the following steps:

when the voltage of N2 single batteries of each group of battery units in M2 group of battery units is larger than or equal to the first preset threshold value, or the voltage difference between N2 single batteries and other single batteries is larger than or equal to the second preset threshold value, outputting a third control instruction to the switch unit, so that the switch unit controls N2 single batteries of each group of battery units in M2 group of battery units to be connected in parallel to form M2 parallel battery packs, controls a second parallel battery unit formed by connecting M2 parallel battery packs in parallel to be connected between the charging interface and the ground, and simultaneously outputting a fourth control instruction to the charger, so that the charger supplies power according to 1 time of battery voltage.

9. The charging method according to claim 5 or 6, characterized by further comprising:

outputting a fifth control instruction to the switch unit, so that the switch unit controls N3 single batteries of each group of M3 battery units to be connected between a load interface and the ground;