CN105914807A - Method for reducing heating of charging cable, and electronic device - Google Patents
Method for reducing heating of charging cable, and electronic device Download PDFInfo
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Abstract
The embodiments of the invention disclose a method for reducing heating of a charging cable, and an electronic device. The method comprises the following steps: when it is detected that a charging joint is inserted into a charging port of the electronic device, calculating a first electrical parameter of the charging cable connected with the charging joint; according to the first electrical parameter, determining maximum charging threshold currents of the charging cable; and generating a second instruction, and sending the second instruction to a charging adapter connected with the charging cable to enable currents output by the charging adapter to the charging cable to be smaller than and equal to the maximum charging threshold currents.
Description
Technical field
The present embodiments relate to electronic equipment charging technique, particularly relate to a kind of method reducing charging cable heating and electronic equipment.
Background technology
Electronic equipment is to meet longer flying power, and battery capacity is increasing, and the corresponding charging interval of battery is more and more longer, and the technology of filling is arisen at the historic moment soon.Fast charging system is made up of charging adapter (Adapter), data wire (Cable) and main frame (Host), but people often only focus on charging adapter and main frame, seldom pay close attention to Cable, as long as thinking that charging head and main frame support are filled soon, in data, arbitrarily collocation can.If but data line impedance is excessive, just easilys lead to data wire overheated, thus be substantially reduced Consumer's Experience.
Summary of the invention
The embodiment of the present invention provides a kind of method reducing charging cable heating and electronic equipment.
The technical scheme of the embodiment of the present invention is achieved in that
A kind of method reducing charging cable heating, described method includes:
When the charging port of detection electronic equipment has charging connector to insert,
Calculate the first electrical parameter of the charging cable being connected with described charging connector；
According to described first electrical parameter, determine the maximum charge threshold current of described charging cable；
Generate the second instruction, send described second instruction to the charging adapter being connected with described charging cable, make the electric current that described charging cable is exported by described charging adapter less than or equal to described maximum charge threshold current.
In the embodiment of the present invention, before calculating the first electrical parameter of the charging cable being connected with described charging connector, described method also includes:
The detection charge mode to described electronic equipment, generates the first testing result；
When the described first testing result current charge mode of sign is charging adapter charging, generate the first instruction；
Perform described first instruction, make described electronic equipment be switched to the second mode of operation by the first mode of operation.
In the embodiment of the present invention, the first electrical parameter of the charging cable that described calculating is connected with described charging connector, including:
Generate the 3rd instruction, and send described 3rd instruction to described charging adapter, make described charging adapter that described charging cable to export the first fixed voltage, the first fixed current；
Detection is with the second voltage of the charging port of electronic equipment during described first fixed current input；
Generate the 4th instruction, and send described 4th instruction to described charging adapter, make described charging adapter that described charging cable is kept described first fixed voltage, export the 3rd fixed current；Described 3rd fixed current is different from described first fixed current；
Detection is with the 4th voltage of the charging port of electronic equipment during described 3rd fixed current input；
According to described first fixed current, described 3rd fixed current, described second voltage, the first electrical parameter of the described 4th voltage described charging cable of calculating.
In the embodiment of the present invention, described method also includes:
When the described first testing result current charge mode of sign is USB charging, described electronic equipment is made to keep described first mode of operation.
In the embodiment of the present invention, described method also includes:
Comparison table between first electrical parameter value and the threshold current born is set by charging cable, described comparison table is stored in described electronic equipment；
It is that described charging cable determines the first charge threshold electric current according to described first electrical parameter, including:
According to the first electrical parameter of the described charging cable calculated, search described comparison table, determine that described charging cable determines maximum charge threshold current.
In the embodiment of the present invention, described first electrical parameter includes impedance.
A kind of electronic equipment, described electronic equipment includes controller, and described controller, when the charging port detecting electronic equipment has charging connector to insert, calculates the first electrical parameter of the charging cable being connected with described charging connector；According to described first electrical parameter, determine the maximum charge threshold current of described charging cable；
Generate the second instruction, send described second instruction to the charging adapter being connected with described charging cable, make the electric current that described charging cable is exported by described charging adapter less than or equal to described maximum charge threshold current.
In the embodiment of the present invention, described controller, before calculating the first electrical parameter of the charging cable being connected with described charging connector, also detects the charge mode to described electronic equipment, generates the first testing result；
When the described first testing result current charge mode of sign is charging adapter charging, generate the first instruction；
Perform described first instruction, make described electronic equipment be switched to the second mode of operation by the first mode of operation.
In the embodiment of the present invention, described controller, it is additionally operable to generate the 3rd instruction, and sends described 3rd instruction to described charging adapter, make described charging adapter that described charging cable to export the first fixed voltage, the first fixed current；
Detection is with the second voltage of the charging port of electronic equipment during described first fixed current input；
Generate the 4th instruction, and send described 4th instruction to described charging adapter, make described charging adapter that described charging cable is kept described first fixed voltage, export the 3rd fixed current；Described 3rd fixed current is different from described first fixed current；
Detection is with the 4th voltage of the charging port of electronic equipment during described 3rd fixed current input；
According to described first fixed current, described 3rd fixed current, described second voltage, the first electrical parameter of the described 4th voltage described charging cable of calculating.
In the embodiment of the present invention, described electronic equipment also includes: memorizer；
The comparison table arranged between the first electrical parameter value and the threshold current born by charging cable is stored in the memorizer of described electronic equipment；
Described controller, being additionally operable to according to described first electrical parameter is that described charging cable determines the first charge threshold electric current, including:
According to the first electrical parameter of the described charging cable calculated, search described comparison table, determine that described charging cable determines maximum charge threshold current.
In the embodiment of the present invention, when the charging port detecting electronic equipment has charging connector to insert, calculate the first electrical parameter of the charging cable being connected with described charging connector；According to described first electrical parameter, determine the maximum charge threshold current of described charging cable；Generate the second instruction, send described second instruction to the charging adapter being connected with described charging cable, make the electric current that described charging cable is exported by described charging adapter less than or equal to described maximum charge threshold current.The embodiment of the present invention determines, according to the first electrical parameter such as impedance etc. of charging cable, the maximum output current not making charging cable overheated, thus limit the heating temp of charging cable, it is not result in that charging cable is overheated, the most there is not disaster hidden-trouble, and improve Consumer's Experience.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the method reducing charging cable heating of the embodiment of the present invention one；
Fig. 2 is the schematic flow sheet of the method reducing charging cable heating of the embodiment of the present invention two；
Fig. 3 is the schematic flow sheet of the method reducing charging cable heating of the embodiment of the present invention three；
Fig. 4 is the schematic flow sheet of the method reducing charging cable heating of the embodiment of the present invention four；
Fig. 5 is the composition structural representation of the electronic equipment of the embodiment of the present invention.
Detailed description of the invention
In order to more fully hereinafter understand feature and the technology contents of the present invention, the realization to the present invention is described in detail below in conjunction with the accompanying drawings, appended accompanying drawing purposes of discussion only for reference, is not used for limiting the present invention.
Technical scheme according to embodiments of the present invention, electronic equipment detects when current charge mode is to be charged by charging adapter, owing to electronic equipment is directly directly connected to power supply by charging adapter, charging cable can be caused to power on flow through big and cause charging cable to generate heat, charging cable is made to be under febrile state for a long time, the charging performance of charging cable will be had a strong impact on, the situation burning out charging cable can be caused time serious, it is also possible to cause fire etc..Charging cable generates heat, and the experience effect of user is the best.
The embodiment of the present invention is just for this technical problem, when electronic equipment detect be directly to be charged by charging adapter time, the output electric current of charging adapter charging is limited so that it is less than the threshold value set, so that charging cable does not haves overheated phenomenon.Below by way of concrete example, it is further elucidated with the essence of embodiment of the present invention technical scheme.
Embodiment one
Fig. 1 is the schematic flow sheet of the method reducing charging cable heating of the embodiment of the present invention one, and as shown in Fig. 1, the method reducing charging cable heating of this example comprises the following steps:
Step 101, whether the charging port of detection electronic equipment has charging connector to insert, and sometimes performs step 102.
In this step, when the charging port of electronic equipment has charging connector to access, electronic equipment can detect the change in voltage of charging port, such that it is able to judge whether charging port has charging connector to access.After charging connector is linked into charging port, the charging circuit in electronic equipment also can produce electric current, thus also can determine whether out the situation that charging connector accesses.Electronic equipment can be by the curent change etc. in the change in voltage of charging port or charging circuit, it is easy to determine whether charging port inserts charging connector.
In the embodiment of the present invention, after determining whether charging port inserts charging connector, also need to further determine that current charge mode, i.e. it needs to be determined that be currently the charging carried out by USB mode, or be directly connected the charging carried out with power supply by charging adapter.In the embodiment of the present invention, current charge mode is that USB mode is when charging, due to USB mode charge output voltage be stable, therefore charging current and charging voltage are all stable, and charging voltage charging current is all to meet USB mode to charge the voltage of relevant criterion and electric current, electronic equipment, by detection charging current or charging voltage, i.e. can determine that current charge mode is that USB mode is charged.And when if charge mode is charging adapter charging, be directly connected with power supply due to charging adapter, its charging voltage and charging current all can have corresponding change by the adjustment of charging adapter.And the voltage that voltage entirety during charging adapter charging is charged higher than USB mode, therefore, by detecting current charging voltage and charging current, i.e. can determine that current charge mode is that USB mode is charged, or charging adapter charging.
In the embodiment of the present invention, when determine current charge mode be USB mode charge time, it is all to set electric current and setting voltage due to its charging voltage and charging current, and voltage and electric current relatively low, also its charging voltage and charging current cannot be adjusted, therefore without its charging voltage and charging current are controlled.
When determining that current charge mode is charging adapter charging, need the charging current in charging cable is limited, to avoid charging cable heating excessively, cause charging cable overheated.
Step 102, calculates the first electrical parameter of the charging cable being connected with described charging connector.
In the embodiment of the present invention, the first electrical parameter includes the impedance of charging cable.By calculating the impedance of charging cable, may determine that and under this impedance, flow through the heat that electric current is generated heat, determine, with this, the threshold current that this charging cable is corresponding, make the electric current that charging cable is exported by charging adapter less than set threshold current, it is ensured that charging cable will not be overheated.
Step 103, according to described first electrical parameter, determines the maximum charge threshold current of described charging cable.
In the embodiment of the present invention, it is however generally that, the impedance of charging cable is the least, and line footpath is the thickest, and the heating power consumption that can bear is the biggest.When after the impedance determining charging cable, may determine that the heating power consumption flowing through electric current under this impedance, so that it is determined that the threshold current that this charging cable is corresponding, make the electric current that charging cable is exported by charging adapter less than set threshold current, it is ensured that charging cable will not be overheated.
In the embodiment of the present invention, the synopsis between the impedance of charging cable and corresponding maximum current can be preset, as shown in table 1 below.
| Charging cable impedance | Maximum current | Heating power consumption |
| >=0.4 Ω | 0.5A | <0.2W |
| 0.3～0.4 Ω | 1A | <0.4W |
| 0.2～0.3 Ω | 1.5A | <0.675W |
| 0.1～0.2 Ω | 2A | <0.8W |
| 0.05～0.1 Ω | 4A | <1.6W |
| ≤ 0.05 Ω | 8A | <3.2W |
Table 1
In the embodiment of the present invention, for the maximum input current setting charging cable of charging cable under each impedance, when the charging cable input current that system needs is more than the charging cable maximum input current set, by charging cable input current clamper at the charging cable maximum input current set, electric current is excessive causes charging cable seriously to generate heat in prevention, thus ensure the safety of charging cable, promote Consumer's Experience.
Step 104, generates the second instruction, sends described second instruction to the charging adapter being connected with described charging cable, makes the electric current that described charging cable is exported by described charging adapter less than or equal to described maximum charge threshold current.
When after the maximum input current determining charging cable, this maximum input current is notified to charging adapter, this charging adapter when being charged to electronic equipment by charging cable, make charging current be not more than all the time determined by the maximum input current of charging cable.
The embodiment of the present invention determines, according to the first electrical parameter such as impedance etc. of charging cable, the maximum output current not making charging cable overheated, thus limit the heating temp of charging cable, it is not result in that charging cable is overheated, the most there is not disaster hidden-trouble, and improve Consumer's Experience.
Embodiment two
Fig. 2 is the schematic flow sheet of the method reducing charging cable heating of the embodiment of the present invention two, as in figure 2 it is shown, the method reducing charging cable heating of this example comprises the following steps:
Step 201, whether the charging port of detection electronic equipment has charging connector to insert, and sometimes performs step 202.
In this step, when the charging port of electronic equipment has charging connector to access, electronic equipment can detect the change in voltage of charging port, such that it is able to judge whether charging port has charging connector to access.After charging connector is linked into charging port, the charging circuit in electronic equipment also can produce electric current, thus also can determine whether out the situation that charging connector accesses.Electronic equipment can be by the curent change etc. in the change in voltage of charging port or charging circuit, it is easy to determine whether charging port inserts charging connector.
Step 202, when detection is charging adapter charging to the charge mode of described electronic equipment, makes described electronic equipment be switched to the second mode of operation by the first mode of operation.
In the embodiment of the present invention, need the detection charge mode to described electronic equipment, generate the first testing result；When the described first testing result current charge mode of sign is charging adapter charging, generate the first instruction；Perform described first instruction, make described electronic equipment be switched to the second mode of operation by the first mode of operation.In the embodiment of the present invention, the first instruction is i.e. to make electronic equipment be in the mode of operation performing that charging adapter carries out relevant control, even if electronic equipment is in the second mode of operation.Second mode of operation is i.e. on the computation schema of the impedance etc. to charging cable, by the calculating to charging cable impedance, is controlled the charging current of charging cable, makes the charging cable will not be overheated.
In the embodiment of the present invention, after determining whether charging port inserts charging connector, also need to further determine that current charge mode, i.e. it needs to be determined that be currently the charging carried out by USB mode, or be directly connected the charging carried out with power supply by charging adapter.In the embodiment of the present invention, current charge mode is that USB mode is when charging, due to USB mode charge output voltage be stable, therefore charging current and charging voltage are all stable, and charging voltage charging current is all to meet USB mode to charge the voltage of relevant criterion and electric current, electronic equipment, by detection charging current or charging voltage, i.e. can determine that current charge mode is that USB mode is charged.And when if charge mode is charging adapter charging, be directly connected with power supply due to charging adapter, its charging voltage and charging current all can have corresponding change by the adjustment of charging adapter.And the voltage that voltage entirety during charging adapter charging is charged higher than USB mode, therefore, by detecting current charging voltage and charging current, i.e. can determine that current charge mode is that USB mode is charged, or charging adapter charging.
In the embodiment of the present invention, when determine current charge mode be USB mode charge time, it is all to set electric current and setting voltage due to its charging voltage and charging current, and voltage and electric current relatively low, also its charging voltage and charging current cannot be adjusted, therefore without its charging voltage and charging current are controlled, according to USB, electronic equipment is charged.
When determining that current charge mode is charging adapter charging, need the charging current in charging cable is limited, to avoid charging cable heating excessively, cause charging cable overheated.
Step 203, calculates the first electrical parameter of the charging cable being connected with described charging connector.
In the embodiment of the present invention, the first electrical parameter includes the impedance of charging cable.By calculating the impedance of charging cable, may determine that and under this impedance, flow through the heat that electric current is generated heat, determine, with this, the threshold current that this charging cable is corresponding, make the electric current that charging cable is exported by charging adapter less than set threshold current, it is ensured that charging cable will not be overheated.
Step 204, according to described first electrical parameter, determines the maximum charge threshold current of described charging cable.
In the embodiment of the present invention, it is however generally that, the impedance of charging cable is the least, and line footpath is the thickest, and the heating power consumption that can bear is the biggest.When after the impedance determining charging cable, may determine that the heating power consumption flowing through electric current under this impedance, so that it is determined that the threshold current that this charging cable is corresponding, make the electric current that charging cable is exported by charging adapter less than set threshold current, it is ensured that charging cable will not be overheated.
In the embodiment of the present invention, the synopsis between the impedance of charging cable and corresponding maximum current can be preset, as shown in aforementioned table 1.
In the embodiment of the present invention, for the maximum input current setting charging cable of charging cable under each impedance, when the charging cable input current that system needs is more than the charging cable maximum input current set, by charging cable input current clamper at the charging cable maximum input current set, electric current is excessive causes charging cable seriously to generate heat in prevention, thus ensure the safety of charging cable, promote Consumer's Experience.
Step 205, generates the second instruction, sends described second instruction to the charging adapter being connected with described charging cable, makes the electric current that described charging cable is exported by described charging adapter less than or equal to described maximum charge threshold current.
When after the maximum input current determining charging cable, this maximum input current is notified to charging adapter, this charging adapter when being charged to electronic equipment by charging cable, make charging current be not more than all the time determined by the maximum input current of charging cable.
The embodiment of the present invention determines, according to the first electrical parameter such as impedance etc. of charging cable, the maximum output current not making charging cable overheated, thus limit the heating temp of charging cable, it is not result in that charging cable is overheated, the most there is not disaster hidden-trouble, and improve Consumer's Experience.
Embodiment three
Fig. 3 is the schematic flow sheet of the method reducing charging cable heating of the embodiment of the present invention three, as it is shown on figure 3, the method reducing charging cable heating of this example comprises the following steps:
Step 301, whether the charging port of detection electronic equipment has charging connector to insert, and sometimes performs step 302.
In this step, when the charging port of electronic equipment has charging connector to access, electronic equipment can detect the change in voltage of charging port, such that it is able to judge whether charging port has charging connector to access.After charging connector is linked into charging port, the charging circuit in electronic equipment also can produce electric current, thus also can determine whether out the situation that charging connector accesses.Electronic equipment can be by the curent change etc. in the change in voltage of charging port or charging circuit, it is easy to determine whether charging port inserts charging connector.
Step 302, when detection is charging adapter charging to the charge mode of described electronic equipment, makes described electronic equipment be switched to the second mode of operation by the first mode of operation.
In the embodiment of the present invention, need the detection charge mode to described electronic equipment, generate the first testing result；When the described first testing result current charge mode of sign is charging adapter charging, generate the first instruction；Perform described first instruction, make described electronic equipment be switched to the second mode of operation by the first mode of operation.In the embodiment of the present invention, the first instruction is i.e. to make electronic equipment be in the mode of operation performing that charging adapter carries out relevant control, even if electronic equipment is in the second mode of operation.Second mode of operation is i.e. on the computation schema of the impedance etc. to charging cable, by the calculating to charging cable impedance, is controlled the charging current of charging cable, makes the charging cable will not be overheated.
In the embodiment of the present invention, after determining whether charging port inserts charging connector, also need to further determine that current charge mode, i.e. it needs to be determined that be currently the charging carried out by USB mode, or be directly connected the charging carried out with power supply by charging adapter.In the embodiment of the present invention, current charge mode is that USB mode is when charging, due to USB mode charge output voltage be stable, therefore charging current and charging voltage are all stable, and charging voltage charging current is all to meet USB mode to charge the voltage of relevant criterion and electric current, electronic equipment, by detection charging current or charging voltage, i.e. can determine that current charge mode is that USB mode is charged.And when if charge mode is charging adapter charging, be directly connected with power supply due to charging adapter, its charging voltage and charging current all can have corresponding change by the adjustment of charging adapter.And the voltage that voltage entirety during charging adapter charging is charged higher than USB mode, therefore, by detecting current charging voltage and charging current, i.e. can determine that current charge mode is that USB mode is charged, or charging adapter charging.
In the embodiment of the present invention, when determine current charge mode be USB mode charge time, it is all to set electric current and setting voltage due to its charging voltage and charging current, and voltage and electric current relatively low, also its charging voltage and charging current cannot be adjusted, therefore without its charging voltage and charging current are controlled.
When determining that current charge mode is charging adapter charging, need the charging current in charging cable is limited, to avoid charging cable heating excessively, cause charging cable overheated.
Step 303, calculates the first electrical parameter of the charging cable being connected with described charging connector.
In the embodiment of the present invention, the first electrical parameter includes the impedance of charging cable.By calculating the impedance of charging cable, may determine that and under this impedance, flow through the heat that electric current is generated heat, determine, with this, the threshold current that this charging cable is corresponding, make the electric current that charging cable is exported by charging adapter less than set threshold current, it is ensured that charging cable will not be overheated.
In the embodiment of the present invention, calculate the first electrical parameter of charging cable in the following manner:
Generate the 3rd instruction, and send described 3rd instruction to described charging adapter, make described charging adapter that described charging cable to export the first fixed voltage, the first fixed current；
In the embodiment of the present invention, when determining that electronic equipment is in the second mode of operation, when needing to calculate charging cable impedance, dependent instruction need to be sent by electronic equipment to charging adapter, make charging adapter that the charging port of electronic equipment to be charged by charging cable with corresponding voltage and electric current by charging cable.
Detection is with the second voltage of the charging port of electronic equipment during described first fixed current input；
Generate the 4th instruction, and send described 4th instruction to described charging adapter, make described charging adapter that described charging cable is kept described first fixed voltage, export the 3rd fixed current；Described 3rd fixed current is different from described first fixed current；
Detection is with the 4th voltage of the charging port of electronic equipment during described 3rd fixed current input；
According to described first fixed current, described 3rd fixed current, described second voltage, the first electrical parameter of the described 4th voltage described charging cable of calculating.
If that the charging cable other end accesses is Adapter, then start the impedance computation mechanism of charging cable, as follows:
Electronic equipment sends instruction to charging adapter, makes charging adapter that charging cable to export fixed voltage, and keeps this output voltage.
Electronic equipment sends instruction to charging adapter, makes charging adapter that charging cable is exported fixed current I1 (such as 0.5A), and detects the now charging cable output voltage V1 (A point voltage, such as 4.9V) to the charging port of electronic equipment.
Electronic equipment sends instruction to charging adapter, makes charging adapter that charging adapter is exported electric current I2 (such as 1A), and detects the now charging cable output voltage V2 (A point voltage, such as 4.8V) to the charging port of electronic equipment.
Impedance R by following formula calculating charging cable:
R=(V2-V1)/(I2-I1)=(4.9-4.8)/(1-0.5)=0.2 Ω.
It should be noted that the aforementioned calculation to cable resistance of the embodiment of the present invention is merely illustrative, it is not intended to limit the technical scheme of the embodiment of the present invention.
Step 304, according to described first electrical parameter, determines the maximum charge threshold current of described charging cable.
In the embodiment of the present invention, it is however generally that, the impedance of charging cable is the least, and line footpath is the thickest, and the heating power consumption that can bear is the biggest.When after the impedance determining charging cable, may determine that the heating power consumption flowing through electric current under this impedance, so that it is determined that the threshold current that this charging cable is corresponding, make the electric current that charging cable is exported by charging adapter less than set threshold current, it is ensured that charging cable will not be overheated.
In the embodiment of the present invention, the synopsis between the impedance of charging cable and corresponding maximum current can be preset, as shown in aforementioned table 1.
In the embodiment of the present invention, for the maximum input current setting charging cable of charging cable under each impedance, when the charging cable input current that system needs is more than the charging cable maximum input current set, by charging cable input current clamper at the charging cable maximum input current set, electric current is excessive causes charging cable seriously to generate heat in prevention, thus ensure the safety of charging cable, promote Consumer's Experience.
Step 305, generates the second instruction, sends described second instruction to the charging adapter being connected with described charging cable, makes the electric current that described charging cable is exported by described charging adapter less than or equal to described maximum charge threshold current.
When after the maximum input current determining charging cable, this maximum input current is notified to charging adapter, this charging adapter when being charged to electronic equipment by charging cable, make charging current be not more than all the time determined by the maximum input current of charging cable.
The embodiment of the present invention determines, according to the first electrical parameter such as impedance etc. of charging cable, the maximum output current not making charging cable overheated, thus limit the heating temp of charging cable, it is not result in that charging cable is overheated, the most there is not disaster hidden-trouble, and improve Consumer's Experience.
Embodiment four
Fig. 4 is the schematic flow sheet of the method reducing charging cable heating of the embodiment of the present invention four, and as shown in Figure 4, the method reducing charging cable heating of this example comprises the following steps:
Step 401, whether the charging port of detection electronic equipment has charging connector to insert, and sometimes performs step 402.
In this step, when the charging port of electronic equipment has charging connector to access, electronic equipment can detect the change in voltage of charging port, such that it is able to judge whether charging port has charging connector to access.After charging connector is linked into charging port, the charging circuit in electronic equipment also can produce electric current, thus also can determine whether out the situation that charging connector accesses.Electronic equipment can be by the curent change etc. in the change in voltage of charging port or charging circuit, it is easy to determine whether charging port inserts charging connector.
Step 402, when detection is charging adapter charging to the charge mode of described electronic equipment, makes described electronic equipment be switched to the second mode of operation by the first mode of operation.
In the embodiment of the present invention, need the detection charge mode to described electronic equipment, generate the first testing result；When the described first testing result current charge mode of sign is charging adapter charging, generate the first instruction；Perform described first instruction, make described electronic equipment be switched to the second mode of operation by the first mode of operation.In the embodiment of the present invention, the first instruction is i.e. to make electronic equipment be in the mode of operation performing that charging adapter carries out relevant control, even if electronic equipment is in the second mode of operation.Second mode of operation is i.e. on the computation schema of the impedance etc. to charging cable, by the calculating to charging cable impedance, is controlled the charging current of charging cable, makes the charging cable will not be overheated.
In the embodiment of the present invention, after determining whether charging port inserts charging connector, also need to further determine that current charge mode, i.e. it needs to be determined that be currently the charging carried out by USB mode, or be directly connected the charging carried out with power supply by charging adapter.In the embodiment of the present invention, current charge mode is that USB mode is when charging, due to USB mode charge output voltage be stable, therefore charging current and charging voltage are all stable, and charging voltage charging current is all to meet USB mode to charge the voltage of relevant criterion and electric current, electronic equipment, by detection charging current or charging voltage, i.e. can determine that current charge mode is that USB mode is charged.And when if charge mode is charging adapter charging, be directly connected with power supply due to charging adapter, its charging voltage and charging current all can have corresponding change by the adjustment of charging adapter.And the voltage that voltage entirety during charging adapter charging is charged higher than USB mode, therefore, by detecting current charging voltage and charging current, i.e. can determine that current charge mode is that USB mode is charged, or charging adapter charging.
In the embodiment of the present invention, when determine current charge mode be USB mode charge time, it is all to set electric current and setting voltage due to its charging voltage and charging current, and voltage and electric current relatively low, also its charging voltage and charging current cannot be adjusted, therefore without its charging voltage and charging current are controlled.
When determining that current charge mode is charging adapter charging, need the charging current in charging cable is limited, to avoid charging cable heating excessively, cause charging cable overheated.
Step 403, calculates the first electrical parameter of the charging cable being connected with described charging connector.
In the embodiment of the present invention, the first electrical parameter includes the impedance of charging cable.By calculating the impedance of charging cable, may determine that and under this impedance, flow through the heat that electric current is generated heat, determine, with this, the threshold current that this charging cable is corresponding, make the electric current that charging cable is exported by charging adapter less than set threshold current, it is ensured that charging cable will not be overheated.
In the embodiment of the present invention, calculate the first electrical parameter of charging cable in the following manner:
Generate the 3rd instruction, and send described 3rd instruction to described charging adapter, make described charging adapter that described charging cable to export the first fixed voltage, the first fixed current；
In the embodiment of the present invention, when determining that electronic equipment is in the second mode of operation, when needing to calculate charging cable impedance, dependent instruction need to be sent by electronic equipment to charging adapter, make charging adapter that the charging port of electronic equipment to be charged by charging cable with corresponding voltage and electric current by charging cable.
Detection is with the second voltage of the charging port of electronic equipment during described first fixed current input；
Generate the 4th instruction, and send described 4th instruction to described charging adapter, make described charging adapter that described charging cable is kept described first fixed voltage, export the 3rd fixed current；Described 3rd fixed current is different from described first fixed current；
Detection is with the 4th voltage of the charging port of electronic equipment during described 3rd fixed current input；
According to described first fixed current, described 3rd fixed current, described second voltage, the first electrical parameter of the described 4th voltage described charging cable of calculating.
If that the charging cable other end accesses is Adapter, then start the impedance computation mechanism of charging cable, as follows:
Electronic equipment sends instruction to charging adapter, makes charging adapter that charging cable to export fixed voltage, and keeps this output voltage.
Electronic equipment sends instruction to charging adapter, makes charging adapter that charging cable is exported fixed current I1 (such as 0.5A), and detects the now charging cable output voltage V1 (A point voltage, such as 4.9V) to the charging port of electronic equipment.
Electronic equipment sends instruction to charging adapter, makes charging adapter that charging adapter is exported electric current I2 (such as 1A), and detects the now charging cable output voltage V2 (A point voltage, such as 4.8V) to the charging port of electronic equipment.
Impedance R by following formula calculating charging cable:
R=(V2-V1)/(I2-I1)=(4.9-4.8)/(1-0.5)=0.2 Ω.
It should be noted that the aforementioned calculation to cable resistance of the embodiment of the present invention is merely illustrative, it is not intended to limit the technical scheme of the embodiment of the present invention.
Step 404, according to described first electrical parameter, determines the maximum charge threshold current of described charging cable.
In the embodiment of the present invention, it is however generally that, the impedance of charging cable is the least, and line footpath is the thickest, and the heating power consumption that can bear is the biggest.When after the impedance determining charging cable, may determine that the heating power consumption flowing through electric current under this impedance, so that it is determined that the threshold current that this charging cable is corresponding, make the electric current that charging cable is exported by charging adapter less than set threshold current, it is ensured that charging cable will not be overheated.
In the embodiment of the present invention, the synopsis between the impedance of charging cable and corresponding maximum current can be preset, as shown in aforementioned table 1.
In the embodiment of the present invention, for the maximum input current setting charging cable of charging cable under each impedance, when the charging cable input current that system needs is more than the charging cable maximum input current set, by charging cable input current clamper at the charging cable maximum input current set, electric current is excessive causes charging cable seriously to generate heat in prevention, thus ensure the safety of charging cable, promote Consumer's Experience.
In the embodiment of the present invention, the comparison table between the first electrical parameter value and the threshold current born can be set by charging cable, as shown in Table 1, and described comparison table is stored in described electronic equipment；So, when electronic equipment is under the second mode of operation, according to the impedance of the first electrical parameter such as charging cable of the described charging cable calculated, searches described comparison table, determine that described charging cable determines maximum charge threshold current.And by the control to charging adapter, make the charging current that charging cable is exported by charging adapter less than the maximum charge threshold current in above-mentioned synopsis.
Step 405, generates the second instruction, sends described second instruction to the charging adapter being connected with described charging cable, makes the electric current that described charging cable is exported by described charging adapter less than or equal to described maximum charge threshold current.
When after the maximum input current determining charging cable, this maximum input current is notified to charging adapter, this charging adapter when being charged to electronic equipment by charging cable, make charging current be not more than all the time determined by the maximum input current of charging cable.
The embodiment of the present invention determines, according to the first electrical parameter such as impedance etc. of charging cable, the maximum output current not making charging cable overheated, thus limit the heating temp of charging cable, it is not result in that charging cable is overheated, the most there is not disaster hidden-trouble, and improve Consumer's Experience.
Fig. 5 is the composition structural representation of the electronic equipment of the embodiment of the present invention, as shown in Figure 5, the embodiment of the present invention has also stated that a kind of electronic equipment, described electronic equipment include controller 50 and memorizer 52, is connected by address and control bus 51 between controller 50 and memorizer 52；Described electronic equipment also has charging port 53.In controller 52, storage has various control program and application program, to be controlled related hardware, completes signal and information processing technology and information input and output etc..Described controller 50, when the charging port detecting electronic equipment has charging connector to insert, calculates the first electrical parameter of the charging cable being connected with described charging connector；According to described first electrical parameter, determine the maximum charge threshold current of described charging cable；
Generate the second instruction, send described second instruction to the charging adapter being connected with described charging cable, make the electric current that described charging cable is exported by described charging adapter less than or equal to described maximum charge threshold current.
In the embodiment of the present invention, described controller 50, before calculating the first electrical parameter of the charging cable being connected with described charging connector, also detects the charge mode to described electronic equipment, generates the first testing result；
When the described first testing result current charge mode of sign is charging adapter charging, generate the first instruction；
Perform described first instruction, make described electronic equipment be switched to the second mode of operation by the first mode of operation.
In the embodiment of the present invention, described controller 50, it is additionally operable to generate the 3rd instruction, and sends described 3rd instruction to described charging adapter, make described charging adapter that described charging cable to export the first fixed voltage, the first fixed current；
Detection is with the second voltage of the charging port of electronic equipment during described first fixed current input；
Generate the 4th instruction, and send described 4th instruction to described charging adapter, make described charging adapter that described charging cable is kept described first fixed voltage, export the 3rd fixed current；Described 3rd fixed current is different from described first fixed current；
Detection is with the 4th voltage of the charging port of electronic equipment during described 3rd fixed current input；
According to described first fixed current, described 3rd fixed current, described second voltage, the first electrical parameter of the described 4th voltage described charging cable of calculating.
In the embodiment of the present invention, the comparison table arranged between the first electrical parameter value and the threshold current born by charging cable is stored in the memorizer of described electronic equipment；
Described controller 50, being additionally operable to according to described first electrical parameter is that described charging cable determines the first charge threshold electric current, including:
According to the first electrical parameter of the described charging cable calculated, search described comparison table, determine that described charging cable determines maximum charge threshold current.
In several embodiments provided herein, it should be understood that disclosed equipment and method, can realize by another way.Apparatus embodiments described above is only schematically, such as, the division of described unit, it is only a kind of logic function to divide, actual can have other dividing mode, such as when realizing: multiple unit or assembly can be in conjunction with, or are desirably integrated into another system, or some features can ignore, or do not perform.It addition, the coupling each other of shown or discussed each ingredient or direct-coupling or communication connection can be the INDIRECT COUPLING by some interfaces, equipment or unit or communication connection, can be being electrical, machinery or other form.
The above-mentioned unit illustrated as separating component can be or may not be physically separate, and the parts shown as unit can be or may not be physical location, i.e. may be located at a place, it is also possible to be distributed on multiple NE；Part or all of unit therein can be selected according to the actual needs to realize the purpose of the present embodiment scheme.
It addition, each functional unit in various embodiments of the present invention can be fully integrated in a processing unit, it is also possible to be that each unit is individually as a unit, it is also possible to two or more unit are integrated in a unit；Above-mentioned integrated unit both can realize to use the form of hardware, it would however also be possible to employ hardware adds the form of SFU software functional unit and realizes.
One of ordinary skill in the art will appreciate that: all or part of step realizing said method embodiment can be completed by the hardware that programmed instruction is relevant, aforesaid program can be stored in a computer read/write memory medium, this program upon execution, performs to include the step of said method embodiment；And aforesaid storage medium includes: the various media that can store program code such as movable storage device, read only memory (ROM, Read Only Memory), magnetic disc or CDs.
Or, if the above-mentioned integrated unit of the present invention realizes using the form of software function module and as independent production marketing or when using, it is also possible to be stored in a computer read/write memory medium.Based on such understanding, the part that prior art is contributed by the technical scheme of the embodiment of the present invention the most in other words can embody with the form of software product, this computer software product is stored in a storage medium, including some instructions with so that a computer equipment (can be personal computer, server or the network equipment etc.) performs all or part of of method described in each embodiment of the present invention.And aforesaid storage medium includes: the various media that can store program code such as movable storage device, read only memory (ROM, Read Only Memory), magnetic disc or CDs.
The above; being only the detailed description of the invention of the present invention, but protection scope of the present invention is not limited thereto, any those familiar with the art is in the technical scope that the invention discloses; change can be readily occurred in or replace, all should contain within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with described scope of the claims.
Claims (10)
1. the method reducing charging cable heating, described method includes:
When the charging port of detection electronic equipment has charging connector to insert,
Calculate the first electrical parameter of the charging cable being connected with described charging connector；
According to described first electrical parameter, determine the maximum charge threshold current of described charging cable；
Generate the second instruction, send described second instruction to the charging adapter being connected with described charging cable,
Make the electric current that described charging cable is exported by described charging adapter less than or equal to described maximum charge threshold value electricity
Stream.
Minimizing charging cable the most according to claim 1 heating method, it is characterised in that calculate with
Before first electrical parameter of the charging cable that described charging connector is connected, described method also includes:
The detection charge mode to described electronic equipment, generates the first testing result；
When the described first testing result current charge mode of sign is charging adapter charging, generate first
Instruction；
Perform described first instruction, make described electronic equipment be switched to the second mode of operation by the first mode of operation.
The method of minimizing charging cable the most according to claim 2 heating, it is characterised in that described meter
Calculate the first electrical parameter of the charging cable being connected with described charging connector, including:
Generate the 3rd instruction, and send described 3rd instruction to described charging adapter, make described adaptive charging
Device exports the first fixed voltage, the first fixed current to described charging cable；
Detection is with the second voltage of the charging port of electronic equipment during described first fixed current input；
Generate the 4th instruction, and send described 4th instruction to described charging adapter, make described adaptive charging
Device keeps described first fixed voltage to described charging cable, exports the 3rd fixed current；Described 3rd fixes
Electric current is different from described first fixed current；
Detection is with the 4th voltage of the charging port of electronic equipment during described 3rd fixed current input；
According to described first fixed current, described 3rd fixed current, described second voltage, described 4th electricity
Pressure calculates the first electrical parameter of described charging cable.
The method of minimizing charging cable the most according to claim 1 heating, it is characterised in that described side
Method also includes:
When the described first testing result current charge mode of sign is USB charging, make described electronic equipment
Keep described first mode of operation.
The method of minimizing charging cable the most according to claim 1 heating, it is characterised in that described side
Method also includes:
By charging cable, the comparison table between the first electrical parameter value and the threshold current born is set,
Described comparison table is stored in described electronic equipment；
It is that described charging cable determines the first charge threshold electric current according to described first electrical parameter, including:
According to the first electrical parameter of the described charging cable calculated, search described comparison table, determine
Described charging cable determines maximum charge threshold current.
6., according to the method reducing charging cable heating described in any one of claim 1 to 5, its feature exists
In, described first electrical parameter includes impedance.
7. an electronic equipment, described electronic equipment includes that controller, described controller are used for detecting electronics and set
When standby charging port has charging connector to insert, calculate the of the charging cable being connected with described charging connector
One electrical parameter；According to described first electrical parameter, determine the maximum charge threshold current of described charging cable；
Generate the second instruction, send described second instruction to the charging adapter being connected with described charging cable,
Make the electric current that described charging cable is exported by described charging adapter less than or equal to described maximum charge threshold value electricity
Stream.
Electronic equipment the most according to claim 7, it is characterised in that described controller is calculating and institute
Before stating the first electrical parameter of the charging cable that charging connector is connected, also detect described electronic equipment
Charge mode, generates the first testing result；
When the described first testing result current charge mode of sign is charging adapter charging, generate first
Instruction；
Perform described first instruction, make described electronic equipment be switched to the second mode of operation by the first mode of operation.
Electronic equipment the most according to claim 8, it is characterised in that described controller, is additionally operable to raw
Become the 3rd instruction, and send described 3rd instruction to described charging adapter, make described charging adapter to institute
State charging cable and export the first fixed voltage, the first fixed current；
Detection is with the second voltage of the charging port of electronic equipment during described first fixed current input；
Generate the 4th instruction, and send described 4th instruction to described charging adapter, make described adaptive charging
Device keeps described first fixed voltage to described charging cable, exports the 3rd fixed current；Described 3rd fixes
Electric current is different from described first fixed current；
Detection is with the 4th voltage of the charging port of electronic equipment during described 3rd fixed current input；
According to described first fixed current, described 3rd fixed current, described second voltage, described 4th electricity
Pressure calculates the first electrical parameter of described charging cable.
Electronic equipment the most according to claim 7, it is characterised in that described electronic equipment also includes:
Memorizer；
Will the comparison table between the first electrical parameter value and the threshold current born be set by charging cable
It is stored in the memorizer of described electronic equipment；
Described controller, being additionally operable to according to described first electrical parameter is that described charging cable determines the first charging
Threshold current, including:
According to the first electrical parameter of the described charging cable calculated, search described comparison table, determine
Described charging cable determines maximum charge threshold current.
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Application publication date: 20160831 |