CN109004699B - Vehicle-mounted charging dynamic adjusting system and adjusting method thereof - Google Patents
Vehicle-mounted charging dynamic adjusting system and adjusting method thereof Download PDFInfo
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- CN109004699B CN109004699B CN201810674110.4A CN201810674110A CN109004699B CN 109004699 B CN109004699 B CN 109004699B CN 201810674110 A CN201810674110 A CN 201810674110A CN 109004699 B CN109004699 B CN 109004699B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/342—The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
- H02J7/00036—Charger exchanging data with battery
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/0071—Regulation of charging or discharging current or voltage with a programmable schedule
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
Abstract
The invention relates to the technical field of vehicle-mounted charging methods, in particular to a vehicle-mounted charging dynamic adjusting system and an adjusting method thereof, wherein the vehicle-mounted charging dynamic adjusting system comprises a DCDC module and two charging modules; an input pin of the DCDC module is connected with an automobile battery, and output pins of the DCDC module are respectively connected with the two charging modules and are used for converting 14V voltage of the automobile battery into 5V voltage and providing 5V working voltage for the two charging modules; the two charging modules respectively provide CDP and SDP charging communication protocols and realize external charging through the HUB charging port. The invention aims to provide a vehicle-mounted charging dynamic adjusting system and an adjusting method thereof, and the technical scheme provided by the invention solves the technical problem that the HUB charging is invalid due to the fact that the conventional vehicle-mounted USB port simultaneously supports the heating generated during CDP charging.
Description
Technical Field
The invention relates to the technical field of vehicle-mounted charging methods, in particular to a vehicle-mounted charging dynamic adjusting system and an adjusting method thereof.
Background
In the current automobile market, two USB ports are generally provided at the console of the automobile, one is a dedicated Charging Port (Charging Downstream Port) and the other is a Standard Downstream pin Port (Standard Downstream Port).
If the automobile user needs to charge the mobile equipment in the driving process, the user needs to find a corresponding charging port to perform quick charging, otherwise, the charging speed is slow, and the operation mode is low in convenience. Such an operation increases the risk during driving, especially when the user drives the vehicle at night.
And because the total output current of the two charging ports of the automobile is 2A, the requirement that the two charging ports support the CDP (1.5A) mode cannot be met. If two charging ports of the HUB output 1.5A current at the same time, namely the two ports adopt large current for charging at the same time, the calculation is carried out according to the switching power supply efficiency of 85 percent: the dissipation power Pd is (3A 5V)/15% -3A 5V is 2.65W, a large amount of heat can be generated, two charging ports are generally arranged on the HUB, the size space of the HUB is limited, the heat dissipation performance is poor, the temperature of a power supply IC is high, the HUB charging failure is easily caused, and the requirement that a vehicle-mounted product normally works at the ambient temperature of 85 ℃ cannot be met.
Disclosure of Invention
The invention aims to provide a vehicle-mounted charging dynamic adjusting system and an adjusting method thereof, and the technical scheme provided by the invention solves the technical problem that the HUB charging is invalid due to the fact that the conventional vehicle-mounted USB port simultaneously supports the heating generated during CDP charging.
In order to solve the above technical problem, an aspect of the present invention provides a vehicle-mounted charging dynamic adjustment system, including a DCDC module and two charging modules;
an input pin of the DCDC module is connected with an automobile battery, and output pins of the DCDC module are respectively connected with the two charging modules and are used for converting 14V voltage of the automobile battery into 5V voltage and providing 5V working voltage for the two charging modules;
the two charging modules respectively provide CDP and SDP charging communication protocols and realize external charging through the HUB charging port.
Preferably, the two charging modules are respectively provided with an IN pin, a CTL1 pin, a CTL2 pin and a STATUS pin; the CTL1 pin and the CTL2 pin are two charging mode control pins of the charging module, and the STATUS pin is a STATUS register pin of the charging module;
the output pins of the DCDC module are respectively connected to the IN pins of the two charging modules;
and the CTL1 pins of the two charging modules are pulled up and connected to the output pin of the DCDC module, and the CTL2 pins are respectively connected to the STATUS pin of the other charging module and connected to the output pin of the DCDC module through pull-up resistors.
Preferably, the two charging modules are further respectively provided with an OUT pin, a DM _ IN pin and a DP _ IN pin which are connected to an external USB TYPE a female port, and are further respectively provided with an ILIM _ LO pin which is grounded through a pull-down resistor; the charging module dynamically adjusts the output voltage of the OUT pin through information transmission of the CTL1 pin, the CTL2 pin, and the STATUS pin.
Preferably, the resistance value of the pull-up resistor is 100k Ω.
Based on the vehicle-mounted charging dynamic adjusting system, the invention also provides a vehicle-mounted charging dynamic adjusting method, wherein the charging mode of the charging module comprises an SDP mode and a CDP mode; the method comprises the following steps:
s100, in a standby state, the two charging modules are in an idle state, and the charging modes are both configured to be CDP modes;
s200, after the mobile equipment is inserted into an external USBTYPEA female port of one of the charging modules, detecting whether the output current of the load charging module is larger than a set value or not;
s300, if the output current of the load charging module is larger than a set value, adjusting the charging mode of the other no-load charging module to be an SDP mode;
s400, if the output current of the load charging module is smaller than a set value, the charging mode of the other no-load charging module is kept to be the CDP mode.
In step S100, in a standby state, the charging modes of the two charging modules are both configured to be the CDP mode; preferably, the level states of the CTL1 pin and the CTL2 pin of the two charging modules are both 1, so that the detection function of the STATUS pin is enabled.
In step S200, after the mobile device is inserted into the external USB TYPE a female port of one of the charging modules, detecting whether the output current of the load charging module is greater than a set value; preferably, the STATUS pin of the load charging module detects whether the charging current of the ILIM _ LO pin is greater than a set value.
Preferably, the set value is inversely proportional to the numerical relationship between the corresponding pull-down resistors, and the product is 5V.
In step S300, if the output current of the load charging module is greater than the set value, the charging mode of the other no-load charging module is adjusted to be the SDP mode; preferably, the method further comprises the step of outputting 0 from a STATUS pin of the load charging module to a CTL2 pin of the no-load charging module; the CTL1 and CTL2 of the no-load charging module are respectively configured to be 1 and 0, the charging mode is configured to be the SDP mode from the CDP mode, the detection function of the STATUS pin is turned off, and the high level is kept output.
In step S400, if the output current of the load charging module is smaller than the set value, the charging mode of the other no-load charging module is maintained as the CDP mode; preferably, the method further comprises the following steps that a STATUS pin of the load charging module outputs 1 to a CTL2 pin of the no-load charging module; CTL1, CTL2 of the unloaded charge module are configured as 1 and 1, respectively, and the charge mode remains in CDP mode.
According to the technical scheme provided by the invention, the charging mode of the charging module is dynamically adjusted through the information transmission of the state pin and the charging control pin of the charging module, so that the problem that any one of two charging ports of the vehicle-mounted HUB supports CDP charging and the HUB is ineffective due to overhigh temperature is effectively solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments of the present invention or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a schematic circuit diagram of a vehicle charging dynamic adjustment system according to an embodiment of the present invention;
fig. 2 is a flow chart of a vehicle-mounted charging dynamic adjustment method according to an embodiment of the invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Because two mouthful total output current that charge of car are 2A, if two mouthful simultaneous output 1.5A's that charge electric current, can produce a large amount of heats, easily lead to HUB to charge inefficacy, can't satisfy the requirement of on-vehicle product normal work under 85 ℃ ambient temperature.
Referring to fig. 1, to solve the above technical problem, in one aspect, the present embodiment provides a vehicle charging dynamic adjustment system, which includes a DCDC module and two charging modules.
The input pin of the DCDC module is connected with the automobile battery, and the output pin of the DCDC module is respectively connected with the two charging modules, and is used for converting 14V voltage of the automobile battery into 5V voltage and providing 5V working voltage for the two charging modules. The two charging modules respectively provide CDP and SDP charging communication protocols, and external charging is realized through the HUB charging port.
Before describing the embodiment of the present invention, the CDP and SDP charging communication protocols are briefly described herein, so as to facilitate understanding of the technical solutions provided in the present embodiment. The USBBC1.2 standard, promulgated in 2010, refers to the ability to directly charge batteries of a closed portable device, becoming a key standard for establishing the correct way to charge batteries through a USB port. The BC1.2 specification briefly specifies three different types of USB ports and two key objects, the three USBBC1.2 port types being SDP, DCP and CDP, respectively.
The SDP is a standard downlink port, is the same as a port defined by a USB2.0 specification, and is grounded through 15k omega respectively by USB data lines D + and D-. When hanging, the maximum load current is 2.5 mA; 100mA in the connected and non-suspended state, a current of 500mA (max) can be configured.
The CDP is a charging downstream port that can supply up to 1.5A current and also supports USB 2.0-compliant data transfer. The port has the 15k omega pull-down resistors necessary for D + and D-communications, as well as internal circuitry for the charger detection phase switching.
IN combination with the charging protocol, IN the vehicle-mounted charging dynamic adjustment system provided by this embodiment, the two charging modules are respectively provided with an IN pin, a CTL1 pin, a CTL2 pin, and a STATUS pin. The CTL1 pin and the CTL2 pin are two charging mode control pins of the charging module, and the STATUS pin is a STATUS register pin of the charging module. The pin is used as a charging current detection and switching circuit pin of the vehicle-mounted charging dynamic regulation system.
The output pins of the DCDC module are respectively connected to the IN pins of the two charging modules; the CTL1 pins of the two charging modules are pulled up to be connected with the output pin of the DCDC module, and the CTL2 pins are respectively connected with the STATUS pin of the other charging module and are connected with the output pin of the DCDC module through pull-up resistors. Wherein the resistance value of the pull-up resistor is 100k omega. The circuit connection structure is used as a charging current detection and switching circuit of the vehicle-mounted charging dynamic regulation system.
The two charging modules are also respectively provided with an OUT pin, a DM _ IN pin and a DP _ IN pin which are connected into an external USBTYPEA female port, and also respectively provided with an ILIM _ LO pin which is grounded through a pull-down resistor; the charging module dynamically adjusts the output voltage of the OUT pin through information transfer of the CTL1 pin, the CTL2 pin, and the STATUS pin.
Referring to fig. 2, based on the above vehicle-mounted charging dynamic adjustment system, another aspect of the embodiment of the present invention further provides a vehicle-mounted charging dynamic adjustment method, where a charging mode of a charging module includes an SDP mode and a CDP mode; the method comprises the following steps:
s100, in a standby state, the two charging modules are in an idle state, and the charging modes are both configured to be CDP modes.
The two charging modules are inserted into the mobile device and are in an idle-load state, the two charging modules can be called idle-load charging modules, and after the mobile device is inserted, the charging module corresponding to the mobile device can be called a load charging module.
In this step, the level states of the CTL1 pin and the CTL2 pin of the two charging modules are both 1, and the detection function of the STATUS pin is enabled.
S200, after the mobile device is inserted into an external USBTYPEA female port of one of the charging modules, whether the output current of the load charging module is larger than a set value or not is detected.
In this step, the load charging module detects whether the charging current of the ILIM _ LO pin is greater than a set value through the STATUS pin.
The set value is inversely proportional to the numerical relationship between the corresponding pull-down resistors, and the product is 5V, which is shown in the following table:
and S300, if the output current of the load charging module is greater than the set value, adjusting the charging mode of the other no-load charging module to be the SDP mode.
In this step, if the output current of the load charging module is greater than the set value, it may be determined that the mobile device inserted into the load charging module supports the CDP protocol, and the mobile device is charged with a large current after being inserted. The output current of the load charging module is larger than a set value, and a STATUS pin of the load charging module outputs 0 to a CTL2 pin of the no-load charging module; the CTL1 and CTL2 of the no-load charging module are respectively configured to be 1 and 0, the charging mode is configured to be the SDP mode from the CDP mode, the detection function of the STATUS pin is turned off, and the high level is kept output. The specific control modes of the CTL1 pin and the CTL2 pin are shown in the following table:
| CTL1 | CTL2 | charging | STATUS detection | |
| 1 | 0 | | OFF | |
| 1 | 1 | CDP | ON |
When another mobile device is inserted into the no-load charging module configured in the SDP mode, only standard current charging (SDP) can be performed, so that the working temperature of the HUB is ensured to be in a normal interval, and the HUB is not easy to burn out.
S400, if the output current of the load charging module is smaller than a set value, the charging mode of the other no-load charging module is kept to be the CDP mode.
In this step, if the output current of the load charging module is smaller than the set value, it may be determined that the mobile device inserted into the load charging module does not support the CDP protocol, and the mobile device is charged with the standard current after being inserted. The output current of the load charging module is smaller than a set value, and a STATUS pin of the load charging module outputs 1 to a CTL2 pin of the no-load charging module; CTL1, CTL2 of the unloaded charge module are configured as 1 and 1, respectively, and the charge mode remains in CDP mode.
When another mobile device is inserted into a no-load charging module which is kept in a CDP mode, if the mobile device supports a CDP protocol, standard large-current charging is carried out; and if the mobile equipment does not support the CDP protocol, standard current charging is carried out.
According to the technical scheme provided by the embodiment of the invention, the charging mode of the charging module is dynamically adjusted through the information transmission of the state pin and the charging control pin of the charging module, so that the problem that any one of two charging ports of the vehicle-mounted HUB supports CDP charging and the HUB is invalid due to overhigh temperature is effectively solved.
The above-described embodiments do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solution.
Claims (8)
1. The utility model provides a vehicle-mounted dynamic adjustment system that charges which characterized in that: the charging device comprises a DCDC module and two charging modules;
an input pin of the DCDC module is connected with an automobile battery, and output pins of the DCDC module are respectively connected with the two charging modules and are used for converting 14V voltage of the automobile battery into 5V voltage and providing 5V working voltage for the two charging modules;
the two charging modules respectively provide CDP and SDP charging communication protocols and realize external charging through a HUB charging port;
the two charging modules are respectively provided with an IN pin, a CTL1 pin, a CTL2 pin and a STATUS pin; the CTL1 pin and the CTL2 pin are two charging mode control pins of the charging module, the STATUS pin is a STATUS register pin of the charging module, and the STATUS pin is used for detecting whether the charging current of the ILIM _ LO pin is greater than a set value or not and outputting 0 or 1 to a CTL2 pin of the no-load charging module through the STATUS pin of the load charging module;
the output pins of the DCDC module are respectively connected to the IN pins of the two charging modules;
the CTL1 pins of the two charging modules are pulled up and connected to the output pin of the DCDC module, and the CTL2 pins are respectively connected to the STATUS pin of the other charging module and connected to the output pin of the DCDC module through pull-up resistors;
the two charging modules are also respectively provided with an OUT pin, a DM _ IN pin and a DP _ IN pin which are connected into an external USB TYPE A female port, and also respectively provided with an ILIM _ LO pin which is grounded through a pull-down resistor; the charging module dynamically adjusts the output voltage of the OUT pin through information transmission of the CTL1 pin, the CTL2 pin, and the STATUS pin.
2. The on-board charging dynamics adjustment system of claim 1, characterized in that: the resistance value of the pull-up resistor is 100k omega.
3. An adjusting method of the vehicle-mounted charging dynamic adjusting system based on claim 2 is characterized in that: the charging mode of the charging module comprises an SDP mode and a CDP mode; the method comprises the following steps:
s100, in a standby state, the two charging modules are in an idle state, and the charging modes are both configured to be CDP modes;
s200, after the mobile device is inserted into an external USB TYPE A female port of one of the charging modules, detecting whether the output current of the load charging module is larger than a set value;
s300, if the output current of the load charging module is larger than a set value, adjusting the charging mode of the other no-load charging module to be an SDP mode;
s400, if the output current of the load charging module is smaller than a set value, the charging mode of the other no-load charging module is kept to be the CDP mode.
4. The adjusting method according to claim 3, wherein in step S100, in a standby state, the charging modes of the two charging modules are both configured to be CDP mode; the method is characterized in that: also comprises the following steps of (1) preparing,
the level states of the CTL1 pin and the CTL2 pin of the two charging modules are both 1, and the detection function of the STATUS pin is enabled.
5. The adjusting method of claim 4, in step S200, after the mobile device is plugged into an external USB TYPE a female port of one of the charging modules, detecting whether an output current of the load charging module is greater than a set value; the method is characterized in that: the STATUS pin of the load charging module detects whether the charging current of the ILIM _ LO pin is greater than a set value.
6. The adjustment method according to claim 5, characterized in that: the set value is inversely proportional to the numerical relationship between the corresponding pull-down resistors, and the product is 5V.
7. The adjusting method of claim 6, wherein in step S300, if the output current of the load charging module is greater than the set value, the charging mode of another no-load charging module is adjusted to be the SDP mode; the method is characterized in that: also comprises the following steps of (1) preparing,
the STATUS pin of the load charging module outputs 0 to the CTL2 pin of the no-load charging module; the CTL1 and CTL2 of the no-load charging module are respectively configured to be 1 and 0, the charging mode is configured to be the SDP mode from the CDP mode, the detection function of the STATUS pin is turned off, and the high level is kept output.
8. The method according to claim 7, wherein in step S400, if the output current of the load charging module is smaller than the set value, the charging mode of the other no-load charging module is maintained to be the CDP mode; the method is characterized in that: also comprises the following steps of (1) preparing,
the STATUS pin of the load charging module outputs 1 to the CTL2 pin of the no-load charging module; CTL1, CTL2 of the unloaded charge module are configured as 1 and 1, respectively, and the charge mode remains in CDP mode.
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| CN102156524A (en) * | 2011-02-11 | 2011-08-17 | 威盛电子股份有限公司 | Adaptive universal serial bus charging method and system |
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