CN108461834B - Battery pack structure, mobile terminal and charge-discharge control method - Google Patents
Battery pack structure, mobile terminal and charge-discharge control method Download PDFInfo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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- H02J7/0077—
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00306—Overdischarge protection
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention provides a battery pack structure, a mobile terminal and a charge and discharge control method, and relates to the technical field of electronic equipment, wherein the battery pack structure comprises: the battery system comprises at least two battery circuits, wherein each battery circuit comprises a battery cell unit, a switch unit and a resistance unit which are connected in series; the detection unit is connected with the resistance unit in parallel and is used for detecting the voltage or the electric quantity of the resistance unit; the control unit is respectively connected with the switch unit and the detection unit and used for receiving detection data detected by the detection unit and determining the current of the battery cell unit according to the detection data; and controlling the working state of the switch unit according to the current. The invention solves the problems that the charging state is difficult to manage and the current between the electric cores flows backwards due to the increase of the battery capacity in the prior art.
Description
Technical Field
The embodiment of the invention relates to the technical field of electronic equipment, in particular to a battery pack structure, a mobile terminal and a charging and discharging control method.
Background
With the rapid development of mobile communication technology, fast charging terminals, such as smart phones and tablet computers, have gradually gained a large share in the market of terminal devices. From the development trend of terminal devices such as smart phones and tablet computers, the display screens of the terminal devices are developed towards large screen and multi-functionalization, the Processing speed of a Central Processing Unit (CPU) is gradually increased, and the change can lead to a rapid increase of the power consumption speed of the rapid charging terminal.
In order not to affect the standby time, the capacity of the battery of the terminal device must also be gradually increased. However, in the case of the prior art, the increase in the capacity of a single battery easily causes the following problems:
(1) the single-path charging current is higher or the charging voltage is higher.
(2) Under the same charging conditions, the charging time of the battery is also increased.
(3) The temperature of the charge and discharge battery is too concentrated to one position, so that the local temperature rise is higher, and the use experience of a user is worse and worse.
(4) If only one battery supplies power, once the battery has a problem, the whole system cannot work.
With the development of the graphene batteries, the high-voltage rapid charging and the low-voltage rapid charging of parallel and serial connection of a plurality of groups of graphene batteries become the mainstream trend, however, when the plurality of groups of graphene batteries are connected in parallel, the problem of current backflow among the battery cores among the plurality of batteries is generated.
In order to solve the problem of current backflow, in some electronic devices, a plurality of batteries with the function of a fuel gauge are connected in parallel and then connected into the electronic devices. However, the electricity meter usually has an overcharge and overdischarge protection function only when the current reaches 2A or more than 2A during overcharge or overdischarge, and cannot manage the parallel charging and discharging states of a plurality of batteries and the problem of current backflow during load power supply.
After a terminal device adopting two or more batteries (the manufacturers or initial states of the two batteries may be different) is used for a period of time, the output voltage (or current) of one battery is reduced more, the battery needs to be taken out to replace a new battery, at this time, if the other battery is in a charging state in the terminal device, the other battery may be already charged to a high voltage, at this time, the new battery is connected into the terminal device, because the battery charged to the high voltage and the newly connected battery have a larger voltage difference, the problem that the high current of the high voltage battery impacts the low voltage battery can occur, namely, the current backflow problem occurs to damage the battery, and the service life of both batteries can be influenced; and because the monomer difference, under the normal use scene, the battery pack's battery cell output voltage size also can not be exactly the same, if directly connect in parallel together, the battery pack monomer that output voltage is high can irritate the electricity for the battery pack monomer that output voltage is low easily.
Meanwhile, because the internal resistances of the batteries connected in parallel are different, the current cannot be distributed averagely during charging, the charging current of the battery with small internal resistance (namely the equivalent resistance value inside the battery is small) is very large, when the battery is nearly fully charged, the other battery with larger internal resistance still needs to be charged with larger current, and the detection circuit cannot detect a signal which is nearly fully charged, so that the voltage cannot be reduced in time and trickle charging is changed, therefore, the battery with small internal resistance can be continuously charged along with the battery with large internal resistance, overcharging occurs, the service life of the battery is damaged, and the unified management of the charging process is inconvenient.
Disclosure of Invention
The invention provides a battery pack structure, a mobile terminal and a charge-discharge control method, and aims to solve the problems that in the prior art, due to the fact that the capacity of a battery is increased, the charging state is difficult to manage and the current between battery cores flows backwards.
In order to solve the technical problem, the invention is realized as follows: a battery pack structure, comprising:
the battery system comprises at least two battery circuits, wherein each battery circuit comprises a battery cell unit, a switch unit and a resistance unit which are connected in series;
the detection unit is connected with the resistance unit in parallel and is used for detecting the voltage or the electric quantity of the resistance unit;
the control unit is respectively connected with the switch unit and the detection unit and used for receiving detection data detected by the detection unit and determining the current of the battery cell unit according to the detection data; and controlling the working state of the switch unit according to the current.
In a first aspect, an embodiment of the present invention further provides a mobile terminal, including the above battery pack structure.
In a second aspect, an embodiment of the present invention further provides a charge and discharge control method applied to the control unit of the battery pack structure, where the method includes:
receiving detection data detected by a detection unit of the battery pack structure, wherein the detection data is the voltage or the electric quantity of a resistance unit of the battery pack structure;
determining the current of a battery cell unit of the battery pack structure according to the detection data;
and controlling the working state of a switch unit of the battery pack structure according to the current.
In a third aspect, an embodiment of the present invention further provides a mobile terminal, including: the charging and discharging control method comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the steps in the charging and discharging control method are realized when the processor executes the computer program.
In the above embodiment of the present invention, the management of the charging and discharging processes of the multi-battery circuit is realized by receiving the detection data of the detection unit, determining the current of the battery cell unit according to the detection data, and controlling the working state of the switch unit according to the current; when the electric quantity of the battery cell unit is detected to be abnormal during charging, the battery cell unit is controlled to stop charging, and the phenomenon that the local temperature rise of the battery is high due to the fact that the single-path charging current is high or the charging voltage is high is avoided; when discharging, when detecting that the electric quantity or the voltage of the battery cell unit is abnormal, the battery cell unit is controlled to stop discharging, and the phenomenon that excessive discharging occurs and other batteries generate current backflow to the battery cell unit to influence the service life is avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced 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 circuit configuration diagram showing one of the battery pack structures according to the embodiment of the present invention;
fig. 2 is a second circuit configuration diagram of a battery pack structure according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a charging and discharging control method according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating a charging control method according to a first example provided in the embodiment of the present invention;
fig. 5 is a flowchart illustrating a discharge control method according to a second example provided in the embodiment of the present invention;
fig. 6 is a block diagram of a mobile terminal according to an embodiment of the present invention.
Description of reference numerals:
b0, a battery cell unit; r0, a resistance unit; u, a detection unit; MCU, control unit; q01, discharge control switch; d01, drain electrode of the discharge control switch; s01, a source electrode of the discharge control switch; q02, charge control switch; d02, drain electrode of the charge control switch; s02, a source electrode of the charging control switch; a P + and a first power supply output terminal; p-, a second power supply output terminal; e1, discharge diode; e2, charging diode; GPIO1, a first general purpose input/output port; GPIO2, a second general purpose input/output port; b1, a first battery cell unit; r1, a first resistance unit; q1, a first discharge control switch; d1, a drain of the first discharge control switch; s1, a source electrode of the first discharge control switch; q2, a first charge control switch; d2, the drain of the first charge control switch; s2, a source electrode of the first charging control switch; b2, a second battery cell unit; r2, a second resistance unit; q3, a second discharge control switch; q4, second charge control switch.
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.
It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
Referring to fig. 1, an embodiment of the present invention provides a battery pack structure including:
at least two battery circuits including a cell unit B0, a switch unit, and a resistance unit R0 connected in series;
the detection unit U is connected with the resistance unit R0 in parallel and is used for detecting the voltage or the electric quantity of the resistance unit R0;
wherein the detection unit U is connected in parallel with the resistance units R0 of all battery circuits.
The control unit MCU is respectively connected with the switch unit and the detection unit U, and is used for receiving detection data detected by the detection unit U and determining the current of the battery cell B0 according to the detection data; and controlling the working state of the switch unit according to the current.
The working state of the switch unit comprises on or off.
Since the resistance unit R0 is connected in series with the cell unit B0, and the current passed by the two is the same, the current of the cell unit B0 can be determined from the data detected by the detection unit U.
The detection unit U is in communication connection with the control unit MCU, receives data detected by the detection unit U, determines current, voltage or electric quantity of the battery cell unit B0 respectively, and controls the charging and discharging states of the battery cell unit B0 through the switch unit.
In the specific embodiment of the invention, the battery monomers of each battery circuit can be separately arranged, so that the product is convenient to realize, and the temperature generated during the charging and discharging of the battery pack can be reduced and dispersed.
Preferably, in an embodiment of the present invention, the switching unit includes a charge control switch Q02 and a discharge control switch Q01;
the working state of the battery cell B0 mainly includes a charging state and/or a discharging state.
The first condition is as follows: the charging state is as follows:
when determining that the direction of the current is a first direction, the first direction is a charging current direction of the cell unit B0, and determining that the electric quantity of the cell unit B0 is greater than or equal to a first threshold according to the magnitude of the current, the control unit MCU outputs a first turn-off signal to the charging control switch Q02;
when the battery cell unit B0 is about to be fully charged and other battery cell units still need to be charged with a large current, if the battery cell unit B0 is continuously charged, the battery cell unit B0 is easily overcharged, and the service life of the battery is damaged; in the embodiment of the invention, when it is determined that the electric quantity of the battery cell unit B0 is greater than or equal to the first threshold value according to the magnitude of the current, a first off signal is output to the charge control switch Q02 to control the charge control switch Q02 to be turned off, and the battery cell unit B0 is no longer charged, so that the local temperature rise of the battery due to the large single-path charging current or the high charging voltage is avoided.
Specifically, if the data detected by the detection unit U is voltage or electric quantity, the control unit MCU converts the voltage or electric quantity into current according to a preset formula, and then obtains the electric quantity of the electric core unit B0 according to the current, which mainly includes the following processes:
1) if the data detected by the detecting unit is the voltage U1, the current I1 is obtained according to the following formula:
I1＝U1/r1；
r1 represents the resistance value of the resistance unit R0;
the electric quantity Qb of the cell unit B0 is:
Qb＝I1*Tb；
wherein Tb represents the charging duration of the battery cell B0, which can be recorded by the control unit MCU.
2) If the data detected by the detection unit is the electric quantity Qu, the current I1 is obtained according to the following formula:
I1＝Qu/T1；
the electric quantity Qb of the cell unit B0 is:
Qb＝I1*Tb。
wherein, T1 represents the charging time of the resistor unit R0, and Tb represents the charging time of the battery cell B0, which can be recorded by the control unit MCU.
In an embodiment of the present invention, the charging and discharging processes of each battery circuit can be controlled independently. During charging and discharging, the charging and discharging of each battery circuit are effectively balanced, so that a part of battery monomers with small internal resistance are prevented from being charged and discharged frequently, and the aging is fast; a part of battery monomers with large internal resistance are less in charge and discharge and slow in aging; the consistency of the battery life is improved.
Case two: and (3) discharging state:
when it is determined that the direction of the current is a second direction, the second direction is a discharge current direction of the cell unit B0,
determining a difference between the electric quantity or the voltage of the cell unit B0 and the other cell units B0 of the battery circuit according to the magnitude of the current;
when the electric quantity difference value is larger than or equal to a second threshold value or the voltage difference value is larger than or equal to a third threshold value,
a second off signal is output to the discharge control switch Q01.
When the difference that the electric quantity of the cell unit B0 is lower than the electric quantities of the cell units B0 of other battery circuits is larger than or equal to a second threshold value according to the magnitude of the current, or the difference that the voltage of the cell unit B0 is lower than the voltage of the cell units B0 of other battery circuits is larger than or equal to a third threshold value according to the magnitude of the current, a second turn-off signal is output to the discharge control switch Q01.
It should be noted that the determination method of the current and the electric quantity in the case two is the same as that in the case one; the voltage determination method may be obtained according to ohm's law after the current is determined, and the embodiments of the present invention are not described herein.
When the control unit MCU determines that the direction of the current is the second direction and that the difference between the electric quantities of the cell unit B0 and the electric quantities of the cell units B0 of the other battery circuits is greater than or equal to the second threshold, the control unit MCU outputs a second turn-off signal to the discharge control switch Q01 to stop the discharge of the cell unit B0, thereby avoiding the over-discharge condition and the reverse flow of the current generated by the other batteries to the cell unit B0, which may affect the service life.
When it is determined according to the magnitude of the current that the voltage of the cell unit B0 is lower than the voltage of the cell units B0 of the other battery circuits by a difference value that is greater than or equal to a third threshold value, a second off signal is output to the discharge control switch Q01, so that the cell unit B0 stops discharging, and the phenomenon that the over-discharge occurs and the current of the other batteries flows backwards to the cell unit B0 to affect the service life is avoided.
Preferably, in a particular embodiment of the present invention,
the charging control switch Q02 and the discharging control switch Q01 are MOS tube switches;
a source S01 of the discharge control switch Q01 is connected in series with the positive electrode of the cell unit B0;
the drain D01 of the charge control switch Q02 is connected in series with the drain D01 of the discharge control switch Q01.
When the charging control switch Q02 is turned on, the battery cell unit B0 is charged; when the discharge control switch Q01 is turned on, the battery cell unit B0 discharges to the outside through the first power output terminal P + and the second power output terminal P-.
Further, a charging diode E2 is connected between the source S02 and the drain D02 of the charging control switch Q02; when the cell unit B0 is in a non-charging state, i.e., the charge control switch Q02 is turned off, the charge diode E2 turns on the battery circuit, so that the cell unit B0 supplies power to the outside.
A discharge diode E1 is connected between the source S01 and the drain D01 of the discharge control switch Q01, and when the cell unit B0 is in a non-discharge state, that is, the discharge control switch Q01 is turned off, the discharge diode E1 turns on the battery circuit, so that the cell unit B0 can be charged.
Due to the existence of the charging diode E2 and the discharging diode E1, when the internal resistance, the input voltage and the output voltage of the battery monomers in the battery pack structure are not equal, the unidirectional conduction of current can be realized by controlling the switch unit, so that the battery monomers are prevented from flowing backwards when the battery pack structure discharges; and can realize that each battery pack is managed independently when charging.
Preferably, in an embodiment of the present invention, the control unit MCU is respectively connected to the gate of the charging control switch Q02 and the gate of the discharging control switch Q01, and outputs control commands to the charging control switch Q02 and the discharging control switch Q01;
specifically, the control unit MCU is provided with a first general purpose input/output port GPIO1 and a second general purpose input/output port GPIO2, which are respectively in communication connection with the discharge control switch Q01 through the first general purpose input/output port GPIO1 and the charge control switch Q02 through the second general purpose input/output port GPIO 2.
Preferably, in an embodiment of the present invention, the control unit MCU receives the detection data detected by the detection unit U, and outputs a third off signal to the switch unit when determining that the detection data is not within a preset data range.
When the battery cell unit B0 is charged and discharged, if the passing electric quantity or voltage is detected not within the preset data range and is not in line with the expected threshold value, if the passing electric quantity or voltage is too large or too small, the corresponding switch unit is turned off, the corresponding battery pack monomer charging and discharging circuit is prompted to be abnormal, and the abnormal condition of the battery pack structure is avoided.
In the above embodiment of the present invention, by receiving the detection data of the detection unit U, determining the current of the battery cell B0 according to the detection data, and controlling the operating state of the switch unit according to the current, management of the charging and discharging processes of the multi-battery circuit is achieved; when the electricity quantity of the battery cell unit B0 is detected to be abnormal during charging, the battery cell unit B0 is controlled to stop charging, and the phenomenon that the local temperature rise of the battery is high due to the fact that the single-path charging current is large or the charging voltage is high is avoided; when discharging, when detecting that the electric quantity or voltage of the battery cell unit B0 is abnormal, the battery cell unit B0 is controlled to stop discharging, so that the phenomenon of over-discharge and the reverse flow of current generated by other batteries to the battery cell unit B0 are avoided, and the service life is not affected. The invention solves the problems that the charging state is difficult to manage and the current between the electric cores flows backwards due to the increase of the battery capacity in the prior art.
Referring to fig. 2, the following further describes a battery pack structure provided by an embodiment of the present invention, in which two battery circuits are taken as specific embodiments, where the battery pack structure includes: two battery circuits, two battery circuits are respectively: the battery pack includes a first battery circuit formed by connecting the first cell unit B1, the first switch unit, and the first resistor unit R1 in series, and a second battery circuit formed by connecting the second cell unit B2, the second switch unit, and the second resistor unit R2 in series. The first cell unit B1 and the second cell unit B2 each include a single battery.
The detection unit U is connected with the first resistance unit R1 in parallel and is used for detecting the voltage or the electric quantity of the first resistance unit R1; and is connected in parallel with the second resistor unit R2 for detecting the voltage or electric quantity of the second resistor unit R2.
The control unit MCU is respectively connected with the first switch unit and the detection unit U, and is used for receiving detection data detected by the detection unit U and determining the current of the first battery cell unit B1 and the current of the second battery cell unit B2 according to the detection data; and controlling the working states of the first switch unit and the second switch unit according to the current. The working states of the first switch unit and the second switch unit comprise on or off.
Since the first resistance unit R1 is connected in series with the first cell unit B1 and therefore passes the same current, the current of the first cell unit B1 can be determined from the data detected by the detection unit U; similarly, the second resistance unit R2 is connected in series with the second cell unit B2 so that the current passed through both is the same, and the current passed through the second cell unit B2 can be determined from the data detected by the detection unit U.
The detection unit U is in communication connection with the control unit MCU, receives data detected by the detection unit U, determines current, voltage or electric quantity of the two battery cell units respectively, and controls charging and discharging states of the two battery cell units through the two switch units.
In the specific embodiment of the invention, the battery monomers of each battery circuit can be separately arranged, so that the product is convenient to realize, and the temperature generated during the charging and discharging of the battery pack can be reduced and dispersed.
Preferably, in an embodiment of the present invention, the first switching unit includes a first charge control switch Q2 and a first discharge control switch Q1; the second switching unit includes a second charge control switch Q4 and a second discharge control switch Q3.
The working states of the first cell unit B1 and the second cell unit B2 mainly include a charging state and/or a discharging state.
The first condition is as follows: the charging state is as follows:
when determining that the direction of the current (the current of the first cell unit B1) is a first direction, the first direction is a charging current direction of the first cell unit B1, and it is determined according to the magnitude of the current that the electric quantity of the first cell unit B1 is greater than or equal to a first threshold value, the control unit MCU outputs a first turn-off signal to the first charge control switch Q2;
when the first cell unit B1 is about to be fully charged and the second cell unit B2 still needs to be charged with a large current, if the first cell unit B1 is continuously charged, the first cell unit B1 is easily overcharged, and the service life of the battery is damaged; in the embodiment of the present invention, when it is determined that the electric quantity of the first battery cell unit B1 is greater than or equal to the first threshold according to the magnitude of the current, a first turn-off signal is output to the first charge control switch Q2, so as to control the first charge control switch Q2 to turn off, and the first battery cell unit B1 is no longer charged, so that a local temperature rise of the battery due to a large single-path charge current or a high charge voltage is avoided.
Specifically, if the data detected by the detection unit U is voltage or electric quantity, the control unit MCU converts the voltage or electric quantity into current according to a preset formula, and then obtains the electric quantity of the first cell unit B1 according to the current, which mainly includes the following processes:
1) if the data detected by the detecting unit is the voltage U1, the current I1 is obtained according to the following formula:
I1＝U1/r1；
r1 represents the resistance value of the first resistance unit R1;
the electric quantity Qb of the first cell unit B1 is:
Qb＝I1*Tb；
wherein Tb represents the charging duration of the first cell unit B1, which may be recorded by the control unit MCU.
2) If the data detected by the detection unit is the electric quantity Qu, the current I1 is obtained according to the following formula:
I1＝Qu/T1；
the electric quantity Qb of the first cell unit B1 is:
Qb＝I1*Tb。
where T1 represents the charging time period of the first resistance unit R1, and Tb represents the charging time period of the first cell unit B1, which can be recorded by the control unit MCU.
Similarly, when determining that the direction of the current (the current of the second cell unit B2) is a first direction, the first direction is a charging current direction of the second cell unit B2, and it is determined that the electric quantity of the second cell unit B2 is greater than or equal to a fourth threshold according to the magnitude of the current, the control unit MCU outputs a fourth off signal to the second charge control switch Q4; the specific implementation manner is the same as that of the first cell unit B1, and the embodiment of the present invention is not described herein again.
In an embodiment of the present invention, the charging and discharging processes of each battery circuit can be controlled independently. During charging and discharging, the charging and discharging of each battery circuit are effectively balanced, so that a part of battery monomers with small internal resistance are prevented from being charged and discharged frequently, and the aging is fast; a part of battery monomers with large internal resistance are less in charge and discharge and slow in aging; the consistency of the battery life is improved.
Case two: and (3) discharging state:
the control unit MCU determines that the direction of the current (the current of the first cell unit B1) is a second direction, which is the discharge current direction of the first cell unit B1,
and when the difference that the electric quantity of the first cell unit B1 is lower than the electric quantities of the cell units of other battery circuits is larger than or equal to a second threshold value according to the magnitude of the current, or the difference that the voltage of the first cell unit B1 is lower than the voltages of the cell units of other battery circuits is larger than or equal to a third threshold value according to the magnitude of the current, outputting a second turn-off signal to the first discharge control switch Q1.
It should be noted that the determination method of the current and the electric quantity in the case two is the same as that in the case one; the voltage determination method may be obtained according to ohm's law after the current is determined, and the embodiments of the present invention are not described herein.
When the control unit MCU determines that the direction of the current (the current of the first cell unit B1) is the second direction and determines that the difference between the electric quantities of the first cell unit B1 and the electric quantities of the cell units of the other battery circuits is greater than or equal to the second threshold, the control unit MCU outputs a second turn-off signal to the first discharge control switch Q1 to stop the discharge of the first cell unit B1, thereby avoiding the over-discharge condition and the reverse flow of the current generated by the other batteries to the first cell unit B1, which may affect the service life.
When it is determined according to the magnitude of the current that the voltage of the first cell unit B1 is lower than the voltage of the cell units of the other battery circuits by a difference value that is greater than or equal to a third threshold value, a second off signal is output to the first discharge control switch Q1, so that the first cell unit B1 stops discharging, and the phenomenon that the over-discharge occurs and the other batteries flow backward the current of the first cell unit B1 to affect the service life is avoided.
Similarly, when the control unit MCU determines that the direction of the current (the current of the second cell unit B2) is the second direction, the second direction is the discharge current direction of the second cell unit B2,
when the difference of the electric quantity of the second cell unit B2 lower than the electric quantities of the cell units of other battery circuits is larger than or equal to a fifth threshold value according to the magnitude of the current, or the difference of the voltage of the second cell unit B2 lower than the voltages of the cell units of other battery circuits is larger than or equal to a sixth threshold value according to the magnitude of the current, outputting a second turn-off signal to the second discharge control switch Q3; the specific implementation manner is the same as that of the first cell unit B1, and the embodiment of the present invention is not described herein again.
Preferably, in a particular embodiment of the present invention,
the first charging control switch Q2 and the first discharging control switch Q1 are MOS tube switches;
the source S1 of the first discharge control switch Q1 is connected in series with the positive pole of the first cell B1; when the first charging control switch Q2 is turned on, charging the first cell unit B1;
the drain D2 of the first charge control switch Q2 is connected in series with the drain D1 of the first discharge control switch Q1; when the first discharge control switch Q1 is turned on, the first battery cell unit B1 discharges to the outside through the first power output terminal P + and the second power output terminal P-.
Further, a charging diode E2 is connected between the source S2 and the drain D2 of the first charging control switch Q2; when the first cell unit B1 is in a non-charging state, i.e., the first charge control switch Q2 is turned off, the charge diode E2 turns on the battery circuit, so that the first cell unit B1 supplies power to the outside.
A discharge diode E1 is connected between the source S1 and the drain D1 of the first discharge control switch Q1, and when the first cell unit B1 is in a non-discharge state, that is, the first discharge control switch Q1 is turned off, the discharge diode E1 turns on the battery circuit, so that the first cell unit B1 can be charged.
Due to the existence of the charging diode E2 and the discharging diode E1, when the internal resistance, the input voltage and the output voltage of the battery monomers in the battery pack structure are not equal, the unidirectional conduction of current can be realized by controlling the first switch unit, so that the battery pack monomers are prevented from flowing backwards when the battery pack structure discharges; and can realize that each battery pack is managed independently when charging.
Preferably, in an embodiment of the present invention, the control unit MCU is respectively connected to the gate of the first charge control switch Q2 and the gate of the first discharge control switch Q1, and outputs control commands to the first charge control switch Q2 and the first discharge control switch Q1;
specifically, the control unit MCU is provided with a first general purpose input/output port GPIO1 and a second general purpose input/output port GPIO2, which are communicatively connected to the first discharge control switch Q1 through the first general purpose input/output port GPIO1 and the first charge control switch Q2 through the second general purpose input/output port GPIO2, respectively.
Preferably, in a specific embodiment of the present invention, the control unit MCU receives the detection data detected by the detection unit U, and outputs a third off signal to the first switch unit when determining that the detection data is not within a preset data range; when the first battery cell unit B1 is charged and discharged, if it is detected that the electric quantity or voltage passing through the R1 is not within the preset data range and does not meet the expected threshold value, and is too large or too small, the corresponding switch unit is turned off, and the abnormality of the charging and discharging circuit of the corresponding battery pack monomer is prompted, so that the abnormal situation of the battery pack structure is avoided.
In the above embodiment of the present invention, by receiving the detection data of the detection unit U, determining the current of the first battery cell B1 according to the detection data, and controlling the operating state of the first switch unit according to the current, management of the charging and discharging processes of the multi-battery circuit is implemented; when charging is carried out, when the electric quantity of the first battery cell unit B1 is detected to be abnormal, the first battery cell unit B1 is controlled to stop charging, and the situation that the local temperature rise of the battery is high due to the fact that the single-path charging current is high or the charging voltage is high is avoided; when discharging, when detecting that the electric quantity or voltage of the first battery cell unit B1 is abnormal, the first battery cell unit B1 is controlled to stop discharging, so that the phenomenon that the first battery cell unit B1 is subjected to current backflow due to over-discharge and other batteries is avoided, and the service life is influenced. The invention solves the problems that the charging state is difficult to manage and the current between the electric cores flows backwards due to the increase of the battery capacity in the prior art.
The invention also provides a mobile terminal which comprises the battery pack structure.
The mobile terminal provided in the embodiment of the present invention can implement each process implemented by the battery pack structure in the embodiment of fig. 1, and is not described herein again to avoid repetition.
Referring to fig. 3, an embodiment of the present invention further provides a charge and discharge control method applied to the control unit MCU of the battery pack structure as defined in the above claim, the method including:
Referring to fig. 1, the control unit MCU is respectively connected to the battery cell unit B0, the switch unit, and the detection unit U, and is configured to receive detection data detected by the detection unit U, and determine a current of the battery cell unit B0 according to the detection data; since the resistance unit R0 is connected in series with the cell unit B0, and the current passed by the two is the same, the current of the cell unit B0 can be determined from the data detected by the detection unit U.
The detection unit U is in communication connection with the control unit MCU and receives data detected by the detection unit U.
In this step, the currents of the two cell units are respectively determined according to the data detected by the detection unit U; specifically, the control unit MCU converts the current into a current according to a preset formula, and the method mainly includes the following steps:
1) if the data detected by the detecting unit is the voltage U1, the current I1 is obtained according to the following formula:
I1＝U1/r1；
r1 represents the resistance value of the resistance unit R0;
2) if the data detected by the detection unit is the electric quantity Qu, the current I1 is obtained according to the following formula:
I1＝Qu/T1；
wherein, T1 represents the charging time of the resistor unit R0, and Tb represents the charging time of the battery cell B0, which can be recorded by the control unit MCU.
And 303, controlling the working state of a switch unit of the battery pack structure according to the current.
Wherein, according to the current of the cell unit B0, the on or off of the switch unit is controlled, so that the cell unit B0 is charged or discharged.
Preferably, in an embodiment of the present invention, the switching unit includes a charge control switch Q02 and a discharge control switch Q01;
when the direction of the current is determined to be a first direction, the first direction is a charging current direction of the cell unit B0, and the electric quantity of the cell unit B0 is determined to be greater than or equal to a first threshold value according to the magnitude of the current, outputting a first turn-off signal to the charge control switch Q02; and/or
When it is determined that the direction of the current is a second direction, the second direction is a discharge current direction of the cell unit B0,
determining an electric quantity difference value or a voltage difference value of the cell unit B0 and other cell units of the battery circuit according to the magnitude of the current;
when the electric quantity difference value is larger than or equal to a second threshold value or the voltage difference value is larger than or equal to a third threshold value,
a second off signal is output to the discharge control switch Q01.
When the battery cell unit B0 is about to be fully charged and other battery cell units still need to be charged with a large current, if the battery cell unit B0 continues to be charged, the battery cell unit B0 is easily overcharged, and the service life of the battery is damaged; in the embodiment of the invention, when it is determined that the electric quantity of the battery cell unit B0 is greater than or equal to the first threshold value according to the magnitude of the current, a first off signal is output to the charge control switch Q02 to control the charge control switch Q02 to be turned off, and the battery cell unit B0 is no longer charged, so that the local temperature rise of the battery due to the large single-path charging current or the high charging voltage is avoided.
And when the control unit MCU determines that the direction of the current (the current of the cell unit B0) is the second direction and determines that the electric quantity of the cell unit B0 is lower than the difference between the electric quantities of other cell units of the battery circuit by more than or equal to a second threshold, the control unit MCU outputs a second turn-off signal to the discharge control switch Q01 to stop discharging the cell unit B0, thereby avoiding the over-discharge condition and the reverse current of other batteries on the cell unit B0 to affect the service life.
And when it is determined that the voltage of the cell unit B0 is lower than the voltage of other cell units of the battery circuit by a difference value greater than or equal to a third threshold value according to the magnitude of the current, outputting a second off signal to the discharge control switch Q01 to stop discharging the cell unit B0, thereby avoiding the occurrence of an over-discharge condition and the influence of reverse current generated by other batteries on the cell unit B0 to the service life.
Preferably, after step 301, the method further comprises:
and when the detection data is determined not to be in the preset data range, outputting a third off signal to the switch unit.
When the battery cell unit B0 is charged and discharged, if the detected electric quantity or voltage passing through the R0 is not in the preset data range and is not in accordance with the expected threshold value, and if the detected electric quantity or voltage is too large or too small, the corresponding switch unit is turned off, the charging and discharging circuit of the corresponding battery pack monomer is prompted to be abnormal, and the abnormal situation of the battery pack structure is avoided.
As a first example, referring to fig. 4, fig. 4 is a flowchart illustrating steps of a charging control method, which mainly includes the following steps:
In step 402, the MCU receives the detection data from the detection unit U.
in step 404, the charging control switch Q02 is controlled to be turned on to charge the battery pack structure.
And step 406, controlling the charging control switch Q02 to be switched off, and prompting that the corresponding battery pack single charging circuit is abnormal.
As a second example, referring to fig. 5, fig. 5 shows a flowchart of the steps of the discharge control method, which mainly includes the following steps:
In step 502, the MCU receives the detection data from the detection unit U.
in step 504, the discharge control switch Q01 is controlled to be turned on.
In the above embodiment of the present invention, by receiving the detection data of the detection unit U, determining the current of the battery cell B0 according to the detection data, and controlling the operating state of the switch unit according to the current, management of the charging and discharging processes of the multi-battery circuit is achieved; when the electricity quantity of the battery cell unit B0 is detected to be abnormal during charging, the battery cell unit B0 is controlled to stop charging, and the phenomenon that the local temperature rise of the battery is high due to the fact that the single-path charging current is large or the charging voltage is high is avoided; when discharging, when detecting that the electric quantity or voltage of the battery cell unit B0 is abnormal, the battery cell unit B0 is controlled to stop discharging, so that the phenomenon of over-discharge and the reverse flow of current generated by other batteries to the battery cell unit B0 are avoided, and the service life is not affected. The invention solves the problems that the charging state is difficult to manage and the current between the electric cores flows backwards due to the increase of the battery capacity in the prior art.
Fig. 6 is a schematic diagram of a hardware structure of a mobile terminal implementing various embodiments of the present invention.
The mobile terminal 600 includes, but is not limited to: a radio frequency unit 601, a network module 602, an audio output unit 603, an input unit 604, a sensor 605, a display unit 606, a user input unit 607, an interface unit 608, a memory 609, a processor 610, and a power supply 611. Those skilled in the art will appreciate that the mobile terminal architecture shown in fig. 6 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 radio frequency unit 601 is configured to receive detection data detected by a detection unit of the battery pack structure, where the detection data is voltage or electric quantity of a resistance unit of the battery pack structure;
a processor 610, configured to determine, according to the detection data, a current of a cell unit of the battery pack structure;
and controlling the working state of a switch unit of the battery pack structure according to the current.
In the above embodiment of the present invention, by receiving the detection data of the detection unit U, determining the current of the battery cell B0 according to the detection data, and controlling the operating state of the switch unit according to the current, management of the charging and discharging processes of the multi-battery circuit is achieved; when the electricity quantity of the battery cell unit B0 is detected to be abnormal during charging, the battery cell unit B0 is controlled to stop charging, and the phenomenon that the local temperature rise of the battery is high due to the fact that the single-path charging current is large or the charging voltage is high is avoided; when discharging, when detecting that the electric quantity or voltage of the battery cell unit B0 is abnormal, the battery cell unit B0 is controlled to stop discharging, so that the phenomenon of over-discharge and the reverse flow of current generated by other batteries to the battery cell unit B0 are avoided, and the service life is not affected.
It should be understood that, in the embodiment of the present invention, the radio frequency unit 601 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 610; in addition, the uplink data is transmitted to the base station. In general, radio frequency unit 601 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 frequency unit 601 may 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 602, such as helping the user send and receive e-mails, browse webpages, access streaming media, and the like.
The audio output unit 603 may convert audio data received by the radio frequency unit 601 or the network module 602 or stored in the memory 609 into an audio signal and output as sound. Also, the audio output unit 603 may also provide audio output related to a specific function performed by the mobile terminal 600 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 603 includes a speaker, a buzzer, a receiver, and the like.
The input unit 604 is used to receive audio or video signals. The input Unit 604 may include a Graphics Processing Unit (GPU) 6041 and a microphone 6042, and the Graphics processor 6041 processes image data of a still picture or video obtained by an image capturing apparatus (such as a camera) in a video capture mode or an image capture mode. The processed image frames may be displayed on the display unit 606. The image frames processed by the graphic processor 6041 may be stored in the memory 609 (or other storage medium) or transmitted via the radio frequency unit 601 or the network module 602. The microphone 6042 can receive sound, and can process 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 601 in case of the phone call mode.
The mobile terminal 600 also includes at least one sensor 605, 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 6061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 6061 and/or the backlight when the mobile terminal 600 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 605 may also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., which are not described in detail herein.
The display unit 606 is used to display information input by the user or information provided to the user. The Display unit 606 may include a Display panel 6061, and the Display panel 6061 may be configured by a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.
The user input unit 607 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 607 includes a touch panel 6071 and other input devices 6072. Touch panel 6071, 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 6071 using a finger, stylus, or any suitable object or accessory). The touch panel 6071 may include two parts of 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 610, receives a command from the processor 610, and executes the command. In addition, the touch panel 6071 can be implemented by various types such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. The user input unit 607 may include other input devices 6072 in addition to the touch panel 6071. Specifically, the other input devices 6072 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 6071 can be overlaid on the display panel 6061, and when the touch panel 6071 detects a touch operation on or near the touch panel 6071, the touch operation is transmitted to the processor 610 to determine the type of the touch event, and then the processor 610 provides a corresponding visual output on the display panel 6061 according to the type of the touch event. Although the touch panel 6071 and the display panel 6061 are shown in fig. 6 as two separate components to implement the input and output functions of the mobile terminal, in some embodiments, the touch panel 6071 and the display panel 6061 may be integrated to implement the input and output functions of the mobile terminal, and is not limited herein.
The interface unit 608 is an interface through which an external device is connected to the mobile terminal 600. 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 608 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 600 or may be used to transmit data between the mobile terminal 600 and external devices.
The memory 609 may be used to store software programs as well as various data. The memory 609 may mainly include a program storage area and a data storage area, wherein the program storage 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 609 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 610 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 609 and calling data stored in the memory 609, thereby integrally monitoring the mobile terminal. Processor 610 may include one or more processing units; preferably, the processor 610 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 610.
The mobile terminal 600 may further include a power supply 611 (e.g., a battery) for supplying power to the various components, and preferably, the power supply 611 is logically connected to the processor 610 via a power management system, so that functions of managing charging, discharging, and power consumption are performed via the power management system.
In addition, the mobile terminal 600 includes some functional modules that are not shown, and are not described in detail herein.
Preferably, an embodiment of the present invention further provides a mobile terminal, which includes a processor 610, a memory 609, and a computer program stored in the memory 609 and capable of running on the processor 610, where the computer program is executed by the processor 610 to implement each process of the above charging and discharging control 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 above charging and discharging control 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 (9)
1. A battery pack structure, comprising:
the battery system comprises at least two battery circuits, wherein each battery circuit comprises a battery cell unit, a switch unit and a resistance unit which are connected in series; the battery cell unit is a battery monomer;
the detection unit is respectively connected with each resistance unit in parallel and is used for detecting the voltage or the electric quantity of each resistance unit;
the control unit is respectively connected with each switch unit and the detection unit, and is used for receiving detection data detected by the detection unit and determining the current of each battery cell unit according to the detection data; controlling the working state of each switch unit according to the current;
the switch unit comprises a charging control switch and a discharging control switch;
when the control unit determines that the direction of the current is a first direction, the first direction is the charging current direction of the battery cell unit, and the electric quantity of the battery cell unit is determined to be greater than or equal to a first threshold value according to the magnitude of the current, a first disconnection signal is output to the charging control switch; and/or
Determining that the direction of the current is a second direction, the second direction being a discharge current direction of the cell unit,
determining an electric quantity difference value or a voltage difference value of the cell unit and other cell units of the battery circuit according to the magnitude of the current;
when the electric quantity difference value is larger than or equal to a second threshold value or the voltage difference value is larger than or equal to a third threshold value,
outputting a second turn-off signal to the discharge control switch;
the control unit receives the detection data detected by the detection unit and outputs a third disconnection signal to the switch unit when determining that the detection data is not in a preset data range; and prompts that the charging and discharging circuit of the corresponding battery pack monomer is abnormal.
2. The battery pack structure according to claim 1,
the charging control switch and the discharging control switch are MOS tube switches;
the source electrode of the discharge control switch is connected with the positive electrode of the battery cell unit in series;
the drain of the charge control switch is connected in series with the drain of the discharge control switch.
3. The battery pack structure according to claim 2,
a charging diode is connected between the source electrode and the drain electrode of the charging control switch;
and a discharge diode is connected between the source electrode and the drain electrode of the discharge control switch.
4. The battery pack structure according to claim 2, wherein the control unit is connected to the gates of the charge control switch and the discharge control switch, respectively.
5. A mobile terminal, comprising: the battery pack structure according to any one of claims 1 to 4.
6. A charging and discharging control method applied to the mobile terminal according to claim 5, the method comprising:
receiving detection data detected by a detection unit of the battery pack structure, wherein the detection data is the voltage or the electric quantity of a resistance unit of the battery pack structure;
determining the current of a battery cell unit of the battery pack structure according to the detection data;
and controlling the working state of a switch unit of the battery pack structure according to the current.
7. The method of claim 6, wherein the switching unit comprises a charge control switch and a discharge control switch;
the step of controlling the operating state of the switching unit of the battery pack structure according to the current includes:
when the current direction is determined to be a first direction, the first direction is the charging current direction of the battery cell unit, and the electric quantity of the battery cell unit is determined to be greater than or equal to a first threshold value according to the current, outputting a first disconnection signal to the charging control switch; and/or
Determining that the direction of the current is a second direction, the second direction being a discharge current direction of the cell unit,
determining an electric quantity difference value or a voltage difference value of the cell unit and other cell units of the battery circuit according to the magnitude of the current;
when the electric quantity difference value is larger than or equal to a second threshold value or the voltage difference value is larger than or equal to a third threshold value,
and outputting a second turn-off signal to the discharge control switch.
8. The method of claim 6, wherein the step of receiving the detection data detected by the detection unit of the battery pack structure is followed by further comprising:
and when the detection data is determined not to be in the preset data range, outputting a third off signal to the switch unit.
9. A mobile terminal, comprising: memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps in the charge and discharge control method according to any one of claims 6 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810145014.0A CN108461834B (en) | 2018-02-12 | 2018-02-12 | Battery pack structure, mobile terminal and charge-discharge control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810145014.0A CN108461834B (en) | 2018-02-12 | 2018-02-12 | Battery pack structure, mobile terminal and charge-discharge control method |
Publications (2)
| Publication Number | Publication Date |
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| CN108461834A CN108461834A (en) | 2018-08-28 |
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| CN111366880A (en) * | 2020-04-03 | 2020-07-03 | 深圳市超力源科技有限公司 | Circuit for intelligently identifying whether battery is connected or not |
| US20240077753A1 (en) * | 2021-01-27 | 2024-03-07 | Google Llc | Bidirectional battery charging and discharging |
| CN115117951A (en) * | 2021-03-23 | 2022-09-27 | 荣耀终端有限公司 | Charging circuit, charging chip and electronic equipment |
| CN116598631B (en) * | 2023-07-17 | 2023-09-26 | 合肥国轩循环科技有限公司 | Lithium battery pack and charging and discharging method thereof |
| CN116774092B (en) * | 2023-08-18 | 2024-04-09 | 荣耀终端有限公司 | Battery detection method, circuit, device, chip and readable storage medium |
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| US5530336A (en) * | 1992-09-17 | 1996-06-25 | Sony Corporation | Battery protection circuit |
| DE69331801T2 (en) * | 1992-10-13 | 2002-11-28 | Sony Corp | BATTERY PACK |
| JP3848574B2 (en) * | 2001-02-20 | 2006-11-22 | セイコーインスツル株式会社 | Charge / discharge control device |
| CN100359780C (en) * | 2003-04-04 | 2008-01-02 | 京东方科技集团股份有限公司 | Chargeable cell unit whose connection state can be controlled and assembled battery |
| US6850039B2 (en) * | 2003-05-02 | 2005-02-01 | O2Micro International Limited | Battery pack and a battery charging/discharging circuit incorporating the same |
| CN101123358B (en) * | 2006-08-10 | 2010-12-01 | 仁宝电脑工业股份有限公司 | Battery module with mixed voltage balance unit and its charging and discharging method |
| JP5177843B2 (en) * | 2007-10-22 | 2013-04-10 | Ｎｅｃエナジーデバイス株式会社 | Battery pack |
| CN103123991B (en) * | 2011-11-18 | 2018-02-13 | 德龙伟创科技(深圳)有限公司 | The lithium system battery of wired in parallel |
| CN103944230B (en) * | 2014-04-25 | 2016-06-29 | 可牛网络技术（北京）有限公司 | The charging system of mobile terminal, method and charger |
| CN105510670A (en) * | 2014-09-24 | 2016-04-20 | 博世汽车部件(苏州)有限公司 | Detection circuit for detecting battery voltage in battery pack, and battery pack |
| CN104917255A (en) * | 2015-07-06 | 2015-09-16 | 深圳东科半导体有限公司 | Equalizing charge and discharge and protection circuit for battery pack |
| CN106487075A (en) * | 2016-12-23 | 2017-03-08 | 深圳市超力源科技有限公司 | A kind of serondary lithium battery charges and is unable to charge/discharge control circuit |
| CN107221979A (en) * | 2017-06-16 | 2017-09-29 | 江苏理工学院 | A kind of electronic equipment charging control circuit |
| CN107276158A (en) * | 2017-06-22 | 2017-10-20 | 深圳拓邦股份有限公司 | A kind of current detection circuit |
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