CN106025440A - Heating control circuit, control method and mobile terminal - Google Patents
Heating control circuit, control method and mobile terminal Download PDFInfo
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- CN106025440A CN106025440A CN201610362682.XA CN201610362682A CN106025440A CN 106025440 A CN106025440 A CN 106025440A CN 201610362682 A CN201610362682 A CN 201610362682A CN 106025440 A CN106025440 A CN 106025440A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 174
- 238000000034 method Methods 0.000 title claims abstract description 28
- 229920006280 packaging film Polymers 0.000 claims description 75
- 239000012785 packaging film Substances 0.000 claims description 75
- 230000005669 field effect Effects 0.000 claims description 59
- 229910052782 aluminium Inorganic materials 0.000 claims description 19
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 19
- 238000012806 monitoring device Methods 0.000 claims description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052744 lithium Inorganic materials 0.000 abstract description 8
- 238000012856 packing Methods 0.000 abstract 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 6
- 229910001416 lithium ion Inorganic materials 0.000 description 6
- 238000004321 preservation Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
-
- 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
- H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/623—Portable devices, e.g. mobile telephones, cameras or pacemakers
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/635—Control systems based on ambient temperature
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/637—Control systems characterised by the use of reversible temperature-sensitive devices, e.g. NTC, PTC or bimetal devices; characterised by control of the internal current flowing through the cells, e.g. by switching
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
- H01M10/6571—Resistive heaters
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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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Electrochemistry (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Automation & Control Theory (AREA)
- Biophysics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a heating control circuit, a control method and a mobile terminal. The mobile terminal comprises a processor and a battery. The heating control circuit comprises a switch circuit electrically connected with the processor, a heating circuit electrically connected with the switch circuit, a battery packing film covering the battery and electrically connected with the heating circuit, and a temperature sensor electrically connected with the processor, wherein the input end of the heating circuit is electrically connected with the anode of a logic power supply, and the processor controls on or off of the switch circuit according to a battery temperature fed back by the temperature sensor, so as to control a heating state of the heating circuit on the battery packing film. The heating control circuit disclosed by the invention heats a battery under a low-temperature charging environment, so that the battery temperature can meet a normal charging requirement, the problem that a lithium battery cannot be normally charged under the low-temperature environment is effectively solved, and the battery charging efficiency and the battery cycle life are guaranteed.
Description
Technical Field
The invention relates to the technical field of electronics, in particular to a heating control circuit, a heating control method and a mobile terminal.
Background
The lithium ion battery has the advantages of high energy density, no memory effect and the like, and is widely applied to various fields. However, due to some characteristic limitations of the lithium ion battery, the requirements of users for charging the mobile terminal with the lithium ion battery are strict. Particularly, in a low-temperature environment, the activity of lithium ions is low, and if the same charging current (such as 0.5C charging) as that at a normal temperature is adopted, metal lithium is easily deposited on the graphite of the negative electrode, so that the cycle life of the battery is reduced, and the expansion rate is increased. Therefore, in order to ensure the cycle life of the battery, it is necessary to reduce the charging current during charging in a low temperature environment, but the reduction of the charging current causes an increase in the charging completion time.
The existing method for solving the problem of low-temperature charging of the lithium battery generally uses charging and discharging pulses to carry out internal self-heating temperature rise on the battery, but lithium precipitation is easily caused if the frequency and amplitude of the pulses are not properly selected, and the temperature rise requirement is hardly met due to small internal resistance of the battery and small generated heat; another method is to preheat the battery by external heating, but if not used in a reasonable way, could result in uneven heating, and also could lead to lithium precipitation.
Disclosure of Invention
The invention provides a heating control circuit, a control method and a mobile terminal, which solve the problems of battery charging and use in a low-temperature environment.
According to an aspect of the present invention, there is provided a heating control circuit applied to a mobile terminal, the mobile terminal including: a processor and a battery; wherein, this heating control circuit includes: the battery temperature monitoring device comprises a switching circuit, a heating circuit, a battery packaging film coated outside a battery and a temperature sensor for collecting the temperature of the battery in real time; wherein,
the input end of the switching circuit is electrically connected with the processor and is used for controlling the on and off of the heating circuit;
the control end of the heating circuit is electrically connected with the output end of the switch circuit, and the input end of the heating circuit is electrically connected with the anode of a logic power supply and used for heating the battery packaging film according to the control of the switch circuit;
the battery packaging film comprises a conductive layer, and the output end of the heating circuit is electrically connected with the conductive layer in the battery packaging film;
the temperature sensor is electrically connected with the processor;
the processor controls the on or off of the switch circuit according to the battery temperature fed back by the temperature sensor so as to control the heating state of the heating circuit to the battery packaging film.
According to still another aspect of the present invention, there is also provided a heating control method applied to a mobile terminal including a battery and a heating control circuit, wherein the heating control circuit includes: the battery packaging film comprises a switch circuit, a heating circuit connected with the switch circuit and a battery packaging film coated outside the battery; the heating control method comprises the following steps:
acquiring the battery temperature of the mobile terminal;
controlling the on or off of the switching circuit according to the temperature of the battery;
and controlling the heating state of the heating circuit to the battery packaging film according to the on or off of the switch circuit.
According to still another aspect of the present invention, there is also provided a mobile terminal including a processor and a battery, the mobile terminal further including a heating control circuit, the heating control circuit including: the mobile terminal comprises a switch circuit, a heating circuit connected with the switch circuit, a battery packaging film coated outside a battery of the mobile terminal and a temperature sensor connected with a processor; wherein,
the temperature sensor is used for acquiring the battery temperature of the mobile terminal;
the processor is used for controlling the on or off of the switch circuit according to the temperature of the battery; thereby controlling the heating state of the heating circuit to the battery packaging film according to the on or off of the switch circuit.
The embodiment of the invention has the beneficial effects that:
the battery is heated by the heating control circuit, so that the battery has a charging condition, the cycle life of the battery is ensured, the charging time of the battery in a low-temperature environment is reduced, and specifically, the processor controls the on or off of the switch circuit according to the battery temperature fed back by the temperature sensor so as to control the heating state of the heating circuit on the battery packaging film. The heating control circuit heats the battery in the low-temperature charging environment, so that the temperature of the battery reaches the normal charging requirement, the problem that the battery cannot be normally charged in the low-temperature environment such as a lithium battery is effectively solved, and the charging efficiency of the battery and the cycle life of the battery are ensured.
Drawings
Fig. 1 is a schematic view showing a configuration of a mobile terminal according to the present invention;
FIG. 2 is a first schematic circuit diagram of a heating control circuit according to a second embodiment of the present invention;
FIG. 3 is a second schematic circuit diagram of a heating control circuit according to a second embodiment of the present invention;
FIG. 4 is a schematic structural view showing a battery packaging film according to a second embodiment of the present invention;
fig. 5 is a schematic structural diagram of a conductive layer according to a second embodiment of the invention;
fig. 6 shows a flowchart of a heating control method according to the present invention.
In the figure, 10, a mobile terminal;
100. a heating control circuit 101, a processor 102, a charging circuit 103 and a battery;
1001. a switch circuit 1002, a heating circuit 1003, a battery packaging film 1004 and a temperature sensor;
D1first logic device, VDDPositive pole of logic power supply, VSSGround terminal of logic power supply, R1Matching resistance, R2And a pull-down resistor.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Example one
As shown in fig. 1, an embodiment of the present invention provides a heating control circuit 100 applied to a mobile terminal 10, where the mobile terminal 10 includes: a processor 101, a charging circuit 102 connected to the processor 101, and a battery 103 connected to the charging circuit 102; the heating control circuit 100 includes: a switch circuit 1001, a heating circuit 1002, a battery packaging film 1003, and a temperature sensor 1004. Wherein,
the switch circuit 1001 is mainly used for controlling the on and off of the heating circuit 1002, wherein the input end of the switch circuit 1001 is electrically connected with the processor 101, the control signals output by the processor 101 are different, and the on and off states of the switch circuit 1001 are different.
The heating circuit 1002 is used forHeating the battery packaging film 1003 according to the control of the switch circuit 1001, wherein the control end of the heating circuit 1002 is electrically connected with the output end of the switch circuit 1001, and the input end of the heating circuit 1002 is connected with the positive electrode V of a logic power supplyDDThe switching circuit 1001 outputs different control signals, and the heating circuit 1002 is electrically connected in different on/off states.
The battery packaging film 1003 covering the outside of the battery 103 can be used for heating and keeping the temperature of the battery 103 in addition to the protection of the battery 103. Specifically, the battery packaging film 1003 includes a conductive layer, and the output terminal of the heating circuit 1002 is electrically connected to the conductive layer in the battery packaging film 1003. When the heating circuit 1002 is conducted with the conductive layer in the battery packaging film 1003, the conductive layer generates heat energy under the action of self resistance, so that a heat source is provided for the battery 103, and the temperature of the battery 103 is increased.
The temperature sensor 1004 is used for collecting the battery temperature in real time, the temperature sensor 1004 is arranged at the periphery of the battery 103 and is electrically connected with the processor 101, and the temperature sensor 1004 feeds the collected battery temperature of the battery 103 back to the processor 101;
the processor 101 controls the switch circuit 1001 to be turned on or off according to the battery temperature fed back by the temperature sensor 1004, so as to control the heating state of the heating circuit 1002 on the battery packaging film 1003, and thus the temperature of the battery 103 is raised.
In summary, the processor 101 controls the switch circuit 1001 to be turned on or off according to the battery temperature fed back by the temperature sensor 1004, so as to control the heating state of the heating circuit 1002 on the battery packaging film 1003. This heating control circuit 100 heats battery 103 under the low temperature charging environment to make the battery temperature reach normal charging requirement, effectively solved like the problem that can not normally charge under the low temperature environment such as lithium cell, guaranteed battery charging efficiency and battery cycle life.
Example two
The above embodiment briefly introduces the heating control circuit 100 of the present invention, wherein the heating control circuit 100 includes: a switch circuit 1001, a heating circuit 1002, a battery packaging film 1003, and a temperature sensor 1004.
Further, as shown in fig. 2 and 3, the switching circuit 1001 includes: at least one first logic device D1The first logic device D1Is electrically connected to the processor 101 of the mobile terminal 10, a first logic device D1Is connected to the heating circuit 1002 point when the first logic device D1When the conductive circuit is turned on, the heating circuit 1002 is controlled to be turned on, so that the heating circuit 1002 is conducted with the conductive layer in the battery packaging film 1003, and the battery packaging film 1003 is heated, thereby completing the temperature rise of the battery 103.
The heating circuit 1002 comprises at least a second logic device D2Second logic device D2And the positive pole V of the logic power supplyDDElectrically connecting; second logic device D2Is electrically connected with the processor 101, and a second logic device D2Output terminal and logic power supply grounding terminal VSSIs electrically connected to the second logic device D2When the conductive layer is turned on, the heating circuit 1002 is in conductive contact with the conductive layer in the battery packaging film 1003 to heat the battery packaging film 1003, thereby completing temperature rise of the battery 103.
In particular, the first logic device D1And a second logic device D2Any component with a switching function may be used, for example: triodes, field effect transistors, etc. The present embodiment is only exemplified by a field effect transistor, and other types of components satisfying the switching characteristics can be applied to the heating control circuit of the present invention.
Wherein the first logic device D1The grid electrode of the N-channel enhanced field effect transistor is electrically connected with the processor 101; the drain electrode of the N-channel enhanced field effect transistor is electrically connected with the heating circuit 1002; grounding terminal V of source electrode and logic power supply of N-channel enhanced field effect transistorSSConnecting; when the battery temperature acquired by the temperature sensor 1004 in real time is lower than a first threshold valueThe processor 101 outputs a high level, the N-channel enhancement type field effect transistor is turned on, and the heating circuit 1002 is controlled to heat the battery packaging film 1003; when the battery temperature acquired by the temperature sensor 1004 in real time is higher than the first threshold value, the processor 101 outputs a low level, the N-channel enhancement type field effect transistor is turned off, and the heating circuit 1002 is controlled to stop heating the battery packaging film 1003. The first threshold is a preferred temperature at which the charging circuit 102 charges the battery 103, that is, charging the battery 103 at the temperature can not only protect the service life of the battery, but also ensure a preferred charging efficiency.
Second logic device D2The grid electrode of the P-channel enhanced field effect transistor is electrically connected with the drain electrode of the N-channel enhanced field effect transistor; the source electrode of the P-channel enhancement mode field effect transistor is electrically connected with the conductive layer in the battery packaging film 1003; the drain electrode of the P-channel enhanced field effect transistor is connected with a logic power supply; when the N-channel enhanced field effect transistor is conducted, the grid electrode of the P-channel enhanced field effect transistor inputs low level, and the N-channel enhanced field effect transistor is conducted to heat the battery packaging film 1003; when the N-channel enhancement type fet is turned off, a high level is input to the gate of the P-channel enhancement type fet, and the N-channel enhancement type fet is turned off to stop heating the battery packaging film 1003.
Specifically, when the battery 103 is an aluminum-shell lithium ion battery, the battery packaging film 1003 is an aluminum layer wrapped on the surface of the battery 103 and connected to the positive electrode (VBAT) of the battery 103, and in order to improve the heating efficiency of the aluminum layer, the resistance value of the aluminum layer can be increased, specifically, the resistance value of the aluminum layer can be increased by doping or the like, that is, the battery packaging film 1003 can be an aluminum layer after doping treatment. Specifically, the schematic circuit structure of the heating control circuit 100 is shown in fig. 2, and the first logic device D1Is an N-channel enhancement mode field effect transistor. Its gate is electrically connected to the processor 101 (i.e., CPU) and its drain is connected to the second logic device D2Electrically connecting; grounding terminal V of source and logic power supplySSConnecting; second logic device D2The grid electrode of the P-channel enhanced field effect transistor is electrically connected with the drain electrode of the N-channel enhanced field effect transistor; sourceThe poles are electrically connected to the conductive layer (i.e., aluminum layer) in the battery packaging film 1003; drain and logic power supply ground terminal VSSConnecting; when the battery temperature acquired by the temperature sensor 1004 in real time is lower than a first threshold value, the CPU outputs a high level, the N-channel enhanced field effect transistor is conducted, the grid electrode of the P-channel enhanced field effect transistor inputs a low level, and the N-channel enhanced field effect transistor is conducted, so that an aluminum layer is heated, and the temperature rise of the battery is realized; when the battery temperature acquired by the temperature sensor 1004 in real time is higher than a first threshold value, the CPU outputs a low level, the N-channel enhanced field effect transistor is turned off, the grid electrode of the P-channel enhanced field effect transistor inputs a high level, and the N-channel enhanced field effect transistor is turned off, so that the heating of the aluminum layer is stopped.
Specifically, when the battery 103 is a polymer lithium ion battery, the structure of the battery packaging film 1003 is shown in fig. 4, and specifically includes: the battery comprises an isolation film coated on the surface of the battery 103, a conductive layer coated outside the isolation film, and a heat preservation layer coated outside the conductive layer, namely the isolation film, the conductive layer and the heat preservation layer are sequentially arranged from inside to outside. The isolating film is made of PP materials, the conducting layer is an aluminum layer, and the conducting layer can be an aluminum layer subjected to doping treatment in order to further improve the impedance value of the aluminum layer and improve the heating effect of the aluminum layer; the heat preservation layer is made of nylon materials with silk-screen information so as to improve the heat preservation performance of the heat preservation layer. Since the conductive layer in this battery structure cannot be directly connected to the positive electrode of the battery, the heating circuit 1002 includes two second logic devices D to ensure that the battery structure is not damaged2Further, the switch circuit 1001 includes two corresponding second logic devices D respectively controlled2First logic device D in on-off state1Wherein the two second logic devices D2Are respectively arranged at two ends of the conductive layer. Specifically, the schematic circuit structure of the heating control circuit 100 is shown in fig. 3, and two first logic devices D1The N-channel enhancement mode field effect transistors are both N-channel enhancement mode field effect transistors, wherein the two N-channel enhancement mode field effect transistors are connected in parallel, and the grid electrodes of the two N-channel enhancement mode field effect transistors are electrically connected with the processor 101 (namely, the CPU); the drains of which are respectively connected with corresponding second logic devices D2Electrically connecting; the sources of which are all grounded to the logic power supplyTerminal VSSConnecting; second logic device D2The field effect transistor is a P-channel enhanced field effect transistor, wherein the grids of the two P-channel enhanced field effect transistors are electrically connected with the drain electrode of the N-channel enhanced field effect transistor; the source electrodes of the two P-channel enhancement mode field effect transistors are respectively electrically connected with two ends of a conductive layer (namely an aluminum layer) in the battery packaging film 1003; the drain electrode of one P-channel enhanced field effect transistor and the grounding end V of the logic power supplySSThe drain electrode of the other P-channel enhanced field effect transistor is connected with the positive electrode V of the logic power supplyDD(e.g., positive VBUS of USB interface) electrical connection; when the temperature of the battery acquired by the temperature sensor 1004 in real time is lower than a first threshold value, the CPU outputs a high level, the two N-channel enhanced field effect transistors are both conducted, so that the grids of the two P-channel enhanced field effect transistors input a low level, the N-channel enhanced field effect transistors are both conducted, an aluminum layer is heated, and the temperature of the battery is raised; when the battery temperature acquired by the temperature sensor 1004 in real time is higher than a first threshold value, the CPU outputs a low level, the N-channel enhanced field effect transistors are all in a turn-off state, the equal grid of the P-channel enhanced field effect transistor inputs a high level, and the N-channel enhanced field effect transistors are turned off, so that the heating of the aluminum layer is stopped.
Further, the heating control circuit 100 further includes a matching resistor R connected in parallel with the heating circuit 10021The matching resistance R1Is electrically connected with the input end of the heating circuit 1002, and is matched with the resistor R1And the other end of the same and a ground terminal V of the logic power supplySSAnd (6) electrically connecting. Specifically, as shown in fig. 2 and 3, the matching resistance R1One end of the resistor is electrically connected with the source electrode of the P-channel enhanced field effect transistor, and the matching resistor R1And the other end of the same and a ground terminal V of the logic power supplySSAnd (6) electrically connecting.
Further, the heating control circuit 100 further includes a pull-down resistor R connected in parallel with the switch circuit 10012. Wherein, the pull-down resistor R2Is electrically connected to the control terminal of the switching circuit 1001, and a pull-down resistor R2And the other end of the same and a ground terminal V of the logic power supplySSElectrical connection, in particular, as in FIG. 2 andas shown in FIG. 3, the pull-down resistor R2One end of the pull-down resistor R is electrically connected with the grid electrode of the N-channel enhanced field effect transistor2And the other end of the same and a ground terminal V of the logic power supplySSAnd (6) electrically connecting.
Further, as shown in fig. 5, in order to facilitate connection with the aluminum layer, two pins protruding outward are respectively disposed at two ends of the aluminum layer.
According to the embodiment of the invention, the battery packaging film is electrified and heated in a low-temperature environment, so that the temperature of the battery is uniformly increased to a temperature interval capable of bearing high-current charging, and the charging time at low temperature is shortened. In addition, this scheme can not increase battery thickness, and need not additionally increase heating or heat conduction devices such as heating wire, PGS, can make the temperature of whole battery rise evenly, and the effectual lithium problem of avoiding educing because local temperature is inhomogeneous produces saves space and cost.
EXAMPLE III
There is also provided, in accordance with another aspect of the embodiments of the present invention, a heating control method applied to a mobile terminal including a battery and a heating control circuit, wherein the heating control circuit includes: the mobile terminal comprises a switch circuit, a heating circuit connected with the switch circuit and a battery packaging film coated outside a battery of the mobile terminal; as shown in fig. 6, the heating control method specifically includes the following steps:
step 61: the battery temperature of the mobile terminal is acquired.
Specifically, the battery temperature of the mobile terminal battery can be collected in real time through a temperature sensor.
Step 62: and controlling the switch-on or switch-off of the switch circuit according to the temperature of the battery.
When the battery temperature acquired by the temperature sensor in real time is lower than a first threshold value, the switching circuit is controlled to be switched on; and when the battery temperature acquired by the temperature sensor in real time is higher than a first threshold value, the switching circuit is controlled to be switched off. The first threshold is a preferred temperature for charging the battery, that is, the battery is charged at the temperature, so that the service life of the battery can be protected, and the preferred charging efficiency can be ensured.
And step 63: and controlling the heating state of the heating circuit to the battery packaging film according to the on or off of the switch circuit.
When the switch circuit is turned off, the heating circuit is controlled to stop heating the battery packaging film;
when the switch circuit is conducted, the heating circuit is controlled to heat the battery packaging film.
Further, the mobile terminal also comprises a charging circuit, and when the switching circuit is conducted, whether the temperature of the battery is higher than a second threshold value is detected; and when the temperature of the battery acquired by the temperature sensor in real time is higher than a second threshold value, controlling the charging circuit to charge the battery. The second threshold is the lowest temperature value at which the battery can bear low-current charging.
Assume that the first threshold is 20 deg.C and the second threshold is-8 deg.C. When the system detects that the charger is inserted, the real-time temperature T of the current battery is detected, the interval where the current real-time temperature T is located is judged, and corresponding control is carried out:
and detecting whether T exceeds 20 ℃, and controlling the switching circuit to be switched off when T exceeds 20 ℃ so as to control the heating circuit not to heat the battery packaging film and directly control the charging circuit to charge the battery with large current, thereby realizing the quick charging of the battery. When T does not exceed 20 ℃, which indicates that the temperature of the battery does not reach the optimal charging temperature, the switch circuit is controlled to be conducted so as to control the heating circuit to heat the battery packaging film, so that the temperature of the battery is increased, and when the temperature of the battery is increased to 20 ℃, the heating of the battery is stopped.
When T does not exceed 20 ℃, further detecting whether T exceeds-8 ℃, and when T exceeds-8 ℃, starting a charging circuit to charge the battery with low current; when the voltage does not exceed the preset voltage, the charging circuit is not started, and the charger directly supplies power to the mobile terminal without charging operation.
It is worth pointing out that the above sequence of the temperature detection and determination process can be adjusted, for example: whether T exceeds-8 ℃ can be judged, whether the charging process is started can be judged, whether the T exceeds 20 ℃ can be judged, and whether the heating process is stopped can be judged.
Specifically, whether T exceeds-8 ℃ is detected, and when T is lower than-8 ℃, the switch circuit is controlled to be conducted so as to control the heating circuit to heat the battery packaging film, but the charging circuit is not started, and the battery is not charged; when T exceeds-8 ℃, whether T exceeds 20 or not is detected, when T is lower than-8 ℃, and when T does not exceed 20 ℃, the temperature of the battery can bear low-current charging, but does not reach the optimal charging temperature, then the charging circuit is started to charge the battery with low current, the switching circuit is controlled to be conducted, the heating circuit is controlled to heat the packaging film of the battery, the temperature of the battery is increased, and when the temperature of the battery is increased to 20 ℃, the heating of the battery is stopped. When T exceeds 20 ℃, the control switch circuit is turned off, and the charging circuit is directly controlled to charge the battery with large current, so that the quick charging of the battery is realized. Further, when T is between the first threshold and the second threshold, the temperature interval may be further subdivided, for example, into three intervals, i.e., a low interval, a medium interval, and a high interval, where a higher interval level indicates that the battery can bear a higher charging current, e.g., -8 ℃ to 0 ℃, and the charging current is 0.1C; 0-5 ℃, charging current of 0.2C and the like.
The heating control method is used for electrifying and heating the battery packaging film in a low-temperature environment, so that the temperature of the battery is uniformly increased to a temperature interval capable of bearing large-current charging, and the charging time at low temperature is shortened.
Example four
As shown in fig. 1, according to still another aspect of the embodiment of the present invention, there is further provided a mobile terminal 10, specifically including a processor 101 and a battery 103, where the mobile terminal 10 further includes a heating control circuit 100, and the heating control circuit 100 includes: a switch circuit 1001, a heating circuit 1002 connected to the switch circuit 1001, a battery packaging film 1003 covering the outside of the battery 103 of the mobile terminal 10, and a temperature sensor 1004 connected to the processor 101; wherein,
a temperature sensor 1004 for acquiring a battery temperature of the mobile terminal 10;
a processor 101 for controlling the switching circuit 1001 to be turned on or off according to the battery temperature; thereby controlling the heating state of the heating circuit 1002 to the battery packaging film 1003 according to the on or off of the switch circuit 1001.
Wherein, the processor 101 is specifically configured to: when the battery temperature acquired by the temperature sensor 1004 in real time is lower than a first threshold, controlling the switch circuit 1001 to be switched on; when the battery temperature acquired by the temperature sensor 1004 in real time is higher than the first threshold, the switch circuit 1001 is controlled to be turned off.
When the switching circuit 1001 is turned off, the heating control circuit 100 controls the heating circuit 1002 to stop heating the battery packaging film 1003; when the switching circuit 1001 is turned on, the heating circuit 1002 is controlled to heat the battery packaging film 1003.
Further, the mobile terminal 10 further includes a charging circuit 102, wherein the processor 101 is further configured to detect whether the battery temperature is higher than a second threshold value when the switching circuit 1001 is turned on; when the battery temperature is higher than the second threshold value, the charging circuit 102 is controlled to charge the battery 103.
The embodiments in the present description are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal 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 terminal. 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 terminal that comprises the element.
While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.
Claims (18)
1. A heating control circuit is applied to a mobile terminal, and the mobile terminal comprises: a processor and a battery; characterized in that the heating control circuit comprises: the battery temperature monitoring device comprises a switching circuit, a heating circuit, a battery packaging film coated outside the battery, and a temperature sensor for collecting the temperature of the battery in real time; wherein,
the input end of the switch circuit is electrically connected with the processor and is used for controlling the on and off of the heating circuit;
the control end of the heating circuit is electrically connected with the output end of the switch circuit, and the input end of the heating circuit is electrically connected with the positive electrode of a logic power supply and is used for heating the battery packaging film according to the control of the switch circuit;
the battery packaging film comprises a conductive layer, and the output end of the heating circuit is electrically connected with the conductive layer in the battery packaging film;
the temperature sensor is electrically connected with the processor;
the processor controls the on or off of the switch circuit according to the battery temperature fed back by the temperature sensor so as to control the heating state of the heating circuit on the battery packaging film.
2. The heating control circuit of claim 1, wherein the switching circuit comprises: the input end of the first logic device is electrically connected with the processor, the output end of the first logic device is electrically connected with the heating circuit, and when the first logic device is conducted, the heating circuit is controlled to be conducted, so that the heating circuit is conducted with the conductive layer in the battery packaging film to heat the battery packaging film.
3. The heating control circuit of claim 2, wherein the first logic device comprises an N-channel enhancement mode field effect transistor,
the grid electrode of the N-channel enhancement type field effect transistor is electrically connected with the processor;
the drain electrode of the N-channel enhanced field effect transistor is electrically connected with the heating circuit;
the source electrode of the N-channel enhanced field effect transistor is connected with the grounding end of the logic power supply;
when the temperature of the battery collected by the temperature sensor is lower than a first threshold value, the processor outputs a high level, the N-channel enhanced field effect transistor is conducted, and the heating circuit is controlled to heat the battery packaging film; when the temperature of the battery collected by the temperature sensor is higher than the first threshold value, the processor outputs a low level, the N-channel enhanced field effect transistor is turned off, and the heating circuit is controlled to stop heating the battery packaging film.
4. The heating control circuit of claim 3, wherein the heating circuit comprises at least a second logic device, an input of the second logic device being electrically connected to the positive terminal of the logic power supply; and when the second logic device is conducted, the heating circuit is conducted with the conductive layer in the battery packaging film to heat the battery packaging film.
5. The heating control circuit of claim 4, wherein the second logic device comprises a P-channel enhancement mode field effect transistor,
the grid electrode of the P-channel enhanced field effect transistor is electrically connected with the drain electrode of the N-channel enhanced field effect transistor;
the source electrode of the P-channel enhanced field effect transistor is electrically connected with the conducting layer in the battery packaging film;
the drain electrode of the P-channel enhanced field effect transistor is connected with the logic power supply;
when the N-channel enhanced field effect transistor is conducted, a grid electrode of the P-channel enhanced field effect transistor inputs a low level, and the N-channel enhanced field effect transistor is conducted to heat the battery packaging film; when the N-channel enhanced field effect transistor is turned off, a high level is input to the grid electrode of the P-channel enhanced field effect transistor, and the N-channel enhanced field effect transistor is turned off to stop heating the battery packaging film.
6. The heating control circuit of claim 4, further comprising: a matching resistor connected in parallel with the heating circuit; one end of the matching resistor is electrically connected with the input end of the heating circuit, and the other end of the matching resistor is electrically connected with the grounding end of the logic power supply.
7. The heating control circuit of claim 2, further comprising: a pull-down resistor connected in parallel with the switching circuit; one end of the pull-down resistor is electrically connected with the control end of the switch circuit, and the other end of the pull-down resistor is electrically connected with the grounding end of the logic power supply.
8. The heating control circuit of claim 1, wherein the conductive layer of the battery packaging film is an aluminum layer that covers the surface of the battery and is connected to the positive electrode of the battery.
9. The heating control circuit of claim 1, wherein the battery packaging film further comprises: the insulating layer is coated outside the conductive layer; wherein the conductive layer is an aluminum layer after doping treatment.
10. A heating control method is applied to a mobile terminal, and is characterized in that the mobile terminal comprises a battery and a heating control circuit, wherein the heating control circuit comprises: the mobile terminal comprises a switch circuit, a heating circuit connected with the switch circuit and a battery packaging film coated outside a battery of the mobile terminal; the heating control method includes:
acquiring the battery temperature of the mobile terminal;
controlling the switch-on or switch-off of the switch circuit according to the battery temperature;
and controlling the heating state of the heating circuit to the battery packaging film according to the on or off of the switch circuit.
11. The heating control method according to claim 10, wherein the step of acquiring the battery temperature of the mobile terminal comprises:
and acquiring the battery temperature of the mobile terminal in real time through a temperature sensor.
12. The heating control method according to claim 11, wherein the step of controlling the switching circuit to be turned on or off in accordance with the battery temperature includes:
when the battery temperature acquired by the temperature sensor in real time is lower than a first threshold value, controlling the switch circuit to be conducted;
and when the battery temperature acquired by the temperature sensor in real time is higher than the first threshold value, controlling the switching circuit to be switched off.
13. The heating control method according to claim 12, wherein the step of controlling the heating state of the battery packaging film by the heating circuit in accordance with the turning on or off of the switching circuit comprises:
when the switch circuit is turned off, controlling the heating circuit to stop heating the battery packaging film;
and when the switch circuit is switched on, the heating circuit is controlled to heat the battery packaging film.
14. The heating control method according to claim 12, wherein the mobile terminal further includes a charging circuit, the heating control method further comprising:
when the switching circuit is conducted, detecting whether the battery temperature is higher than a second threshold value;
and when the battery temperature is higher than the second threshold value, controlling the charging circuit to charge the battery.
15. A mobile terminal comprising a processor and a battery, wherein the mobile terminal further comprises a heating control circuit, the heating control circuit comprising: the mobile terminal comprises a switch circuit, a heating circuit connected with the switch circuit, a battery packaging film coated outside a battery of the mobile terminal and a temperature sensor connected with the processor; wherein,
the temperature sensor is used for acquiring the battery temperature of the mobile terminal;
the processor is used for controlling the on or off of the switch circuit according to the battery temperature; thereby controlling the heating state of the battery packaging film by the heating circuit according to the on or off of the switch circuit.
16. The mobile terminal of claim 15, wherein the processor is specifically configured to:
when the battery temperature acquired by the temperature sensor in real time is lower than a first threshold value, controlling the switch circuit to be conducted;
and when the battery temperature acquired by the temperature sensor in real time is higher than the first threshold value, controlling the switching circuit to be switched off.
17. The mobile terminal according to claim 16, wherein the heating control circuit controls the heating circuit to stop heating the battery packaging film when the switch circuit is turned off; and when the switch circuit is switched on, the heating circuit is controlled to heat the battery packaging film.
18. The mobile terminal of claim 17, further comprising a charging circuit, wherein the processor is further configured to detect whether the battery temperature is above a second threshold when the switching circuit is turned on; and when the battery temperature is higher than the second threshold value, controlling the charging circuit to charge the battery.
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| CN201610362682.XA CN106025440A (en) | 2016-05-26 | 2016-05-26 | Heating control circuit, control method and mobile terminal |
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| CN109830766A (en) * | 2019-01-31 | 2019-05-31 | 维沃移动通信有限公司 | Battery component and terminal |
| CN109910616A (en) * | 2019-03-21 | 2019-06-21 | 奇瑞新能源汽车技术有限公司 | A kind of heating protection circuit of power system of electric automobile |
| CN110416640A (en) * | 2019-07-17 | 2019-11-05 | 北京汽车集团越野车有限公司 | Combination power battery charge/discharge control method, system and automobile |
| CN110635183A (en) * | 2019-09-23 | 2019-12-31 | 骆驼集团武汉光谷研发中心有限公司 | Power battery system and charging method for low-temperature charging optimized heating strategy |
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