CN114256932B - Power distribution method and system for charging base - Google Patents
Power distribution method and system for charging base Download PDFInfo
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- CN114256932B CN114256932B CN202111609549.7A CN202111609549A CN114256932B CN 114256932 B CN114256932 B CN 114256932B CN 202111609549 A CN202111609549 A CN 202111609549A CN 114256932 B CN114256932 B CN 114256932B
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Classifications
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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
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00304—Overcurrent protection
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Abstract
The invention discloses a power supply distribution method of a charging base, which comprises the following steps: collecting current values of current output ends of the charging base; the output of charging base includes: a fixed output terminal, a controllable output terminal, and an adjustable battery charging terminal; calculating the sum of the current values of all the output ends of the charging base, and judging whether the sum of the current values of all the output ends of the charging base is larger than the rated current of the charging base or not; when the sum of the current values of the output ends is judged to be larger than the rated current of the charging base, the current output of the controllable output end and/or the charging end of the adjustable battery is controlled to be adjusted, so that the sum of the current values of the output ends of the adjusted charging base is smaller than or equal to the rated current of the charging base. According to the invention, under the condition that the maximum rated power of the charging base adapter is certain, when a plurality of loads are required to be charged simultaneously and the controllable battery is charged, an balanced charging scheme is provided, so that overload is avoided, and the charging efficiency of the battery and other equipment is ensured to the maximum extent.
Description
Technical Field
The present invention relates to the field of charging devices, and in particular, to a method and a system for power distribution of a charging base.
Background
The input end of the charging base is connected with a household power supply through an adapter, and the output is used as the charging power supply to provide service for one or more devices. When the base design can be charged independently, a special charging control chip is designed to control the charging behavior. For example, the battery temperature is obtained through monitoring, and the charging current and the charging voltage of the battery are adjusted through monitoring and obtaining the main board temperature so as to ensure the safe operation of the battery and the whole charging system. Some charging devices, such as handheld devices like mobile phones, are built with their own charging control chip to regulate the electrical logic to serve the built-in battery, so that the charging behavior of the base is not controlled, and only enough charging power is provided for the base.
The input end of the charging base is connected with a household power supply through a power adapter, and the maximum rated power output by one fixed power adapter is fixed. When multiple loads are simultaneously operated at full load exceeding the maximum rated power of the power adapter, the power adapter is overloaded and damaged. On the one hand, the full-load operation of all devices at the same time is not normal, but cannot be avoided. On the other hand, simply selecting an adapter that can meet all devices while operating at full load is limited. A reasonable balanced power distribution scheme is needed to solve the problem.
Disclosure of Invention
The invention aims to provide a power distribution method and a system for a charging base, which solve the problems.
The technical scheme provided by the invention is as follows:
in one aspect, a power distribution system for a charging dock is provided, comprising:
the current acquisition module is used for acquiring current values of all output ends of the current charging base; the output end of the charging base comprises: a fixed output terminal, a controllable output terminal, and an adjustable battery charging terminal; wherein the fixed output end is set to be in a normally open mode; the opening or closing of the controllable output end is controlled by a control processing module; the magnitude of the output current of the adjustable battery charging end is controlled by the control processing module;
the calculation judging module is used for calculating the sum of the current values of the output ends of the charging base and judging whether the sum of the current values of the output ends of the charging base is larger than the rated current of the charging base or not;
and the control processing module is used for controlling and adjusting the current output of the controllable output end and/or the charging end of the adjustable battery when the sum of the current values of the output ends is judged to be larger than the rated current of the charging base, so that the sum of the current values of the output ends of the charging base after adjustment is smaller than or equal to the rated current of the charging base.
In some embodiments, the control processing module comprises:
the detection submodule is used for detecting whether the output current of the controllable output end is larger than a preset charging current or not when the sum of the current values of the output ends is judged to be larger than the rated current of the charging base;
the calculating sub-module is used for calculating the maximum output current of the adjustable battery charging end according to the current value of the fixed output end, the current value of the controllable output end and the rated current value of the input end of the charging base when the output current of the controllable output end is larger than the preset charging current;
and the operation processing sub-module is used for adjusting the output current of the adjustable battery charging end according to the calculated maximum output current of the adjustable battery charging end.
In some embodiments, the calculating sub-module calculates the maximum output current of the adjustable battery charging terminal according to the current value of the fixed output terminal, the current value of the controllable output terminal, and the rated current value of the input terminal of the charging base, and specifically includes:
the calculating submodule calculates and obtains the maximum output current distributed to the charging end of the adjustable battery through the following formula;
(I 3 ) max ＝min[(I 0 -I 1 -I 2 )，I s3 ]；
wherein I is 3 For an output current allocated to the charging terminal of the adjustable battery; i 0 Rated current for an input end; i 1 The current value of the output end is fixed; i 2 The current value of the controllable output end; i s3 And rated current value of the charging end of the adjustable battery is obtained.
In some embodiments, the operation processing sub-module is further configured to close the charging circuit of the controllable output terminal when the output current of the controllable output terminal is less than a preset charging current.
In some embodiments, the calculating submodule is further configured to calculate, when the charging circuit of the controllable output is turned off, a maximum output current allocated to the adjustable battery charging terminal based on the current value of the fixed output, the rated current value of the adjustable battery charging terminal, and the rated current of the input terminal of the charging base, as:
(I 3 ) max ＝min[(I 0 -I 1 )，I s3 ]；
wherein I is 3 For an output current allocated to the charging terminal of the adjustable battery; i 0 Rated current is set for the input end of the charging base; i 1 A current value for the fixed output; i s3 And rated current value of the charging end of the adjustable battery is obtained.
In some embodiments, the calculating submodule is further configured to calculate, when the charging circuit of the controllable output terminal is turned off, an output current allocated to the charging terminal of the adjustable battery based on a real-time temperature according to the charging base and a temperature of the battery, specifically:
(I 3 ) max ＝min((I 0 -I 1 )，I s3 ，I batt ，I b1 )；
wherein I is 3 For an output current allocated to the charging terminal of the adjustable battery; i 0 Rated current is set for the input end of the charging base; i 1 A current value for the fixed output; i batt A charging current limiting value corresponding to the real-time temperature of the battery; i b1 A charging current limiting value corresponding to the real-time temperature of the charging base; i s3 And rated current value of the charging end of the adjustable battery is obtained.
In some embodiments, further comprising:
the control processing module is also used for closing the controllable output end according to a default instruction;
and the timing triggering module is used for triggering and opening the controllable output end at fixed time when the controllable output end is in a closed state.
A power distribution method for a charging base, comprising:
collecting current values of current output ends of the charging base; the output end of the charging base comprises: a fixed output terminal, a controllable output terminal, and an adjustable battery charging terminal; wherein the fixed output end is set to be in a normally open mode; the opening or closing of the controllable output end is controlled by a control processing module; the magnitude of the output current of the adjustable battery charging end is controlled by the control processing module;
calculating the sum of the current values of all the output ends of the charging base, and judging whether the sum of the current values of all the output ends of the charging base is larger than the rated current of the charging base or not;
when the sum of the current values of the output ends is judged to be larger than the rated current of the charging base, controlling and adjusting the current output of the controllable output end and/or the charging end of the adjustable battery, so that the sum of the current values of the output ends of the charging base after adjustment is smaller than or equal to the rated current of the charging base.
In some embodiments, when it is determined that the sum of the current values of the output terminals is greater than the rated current of the charging base, controlling and adjusting the current output of the controllable output terminal and/or the adjustable battery charging terminal so that the sum of the current values of the output terminals of the charging base after adjustment is less than or equal to the rated current of the charging base, specifically including:
when the sum of the current values of the output ends is judged to be larger than the rated current of the charging base, detecting whether the output current of the controllable output end is larger than a preset charging current or not;
when the output current of the controllable output end is larger than the preset charging current, calculating the maximum output current of the adjustable battery charging end according to the current value of the fixed output end, the current value of the controllable output end and the rated current value of the input end of the charging base;
according to the calculated maximum output current of the charging end of the adjustable battery, adjusting the output current of the charging end of the adjustable battery;
and when the output current of the controllable output end is smaller than the preset charging current, closing the charging circuit of the controllable output end.
In some embodiments, the method further comprises the step of:
setting the controllable output end to a default closing mode;
and when the controllable output end is in a closed state, the controllable output end is triggered to be opened at fixed time.
The power supply distribution method and system of the charging base provided by the invention have the following technical effects:
according to the invention, under the condition that the maximum rated power of the charging base adapter is certain, when a plurality of loads need to be charged simultaneously, and the controllable battery charging condition is included, an balanced charging scheme is provided, so that overload is avoided, and the charging efficiency of the battery and other equipment is ensured to the maximum extent.
Drawings
The invention is described in further detail below with reference to the attached drawings and detailed description:
FIG. 1 is a schematic diagram of one embodiment of a power distribution apparatus of a charging dock of the present invention;
FIG. 2 is a block diagram of the hardware principles of the present invention;
fig. 3 is a schematic diagram of an embodiment of a power distribution method of a charging base of the present invention.
Detailed Description
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
For the sake of simplicity of the drawing, the parts relevant to the present invention are shown only schematically in the figures, which do not represent the actual structure thereof as a product. Additionally, in order to simplify the drawing for ease of understanding, components having the same structure or function in some of the drawings are shown schematically with only one of them, or only one of them is labeled. Herein, "a" means not only "only this one" but also "more than one" case.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
In this context, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, unless explicitly stated or limited otherwise; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In addition, in the description of the present application, the terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will explain the specific embodiments of the present invention with reference to the accompanying drawings. It is evident that the drawings in the following description are only examples of the invention, from which other drawings and other embodiments can be obtained by a person skilled in the art without inventive effort.
In one embodiment, the present invention provides a power distribution system of a charging base, as shown in fig. 1, including:
the current acquisition module 101 is used for acquiring current values of all output ends of the current charging base; the output of charging base includes: fixed output, controllable output, and adjustable battery charging.
Wherein the fixed output terminal is set to be in a normally open mode. The opening or closing of the controllable output end is controlled by the control processing module. The output current of the charging end of the adjustable battery is controlled by the control processing module.
Illustratively, in a normal operating state, the fixed output is connected to a first load (Dev 1), the controllable output is connected to a second load (Dev 2), and the adjustable Battery charging terminal is connected to a controllable Battery (Battery). The fixed output end connected with the first load is normally open, and the opening or closing of the controllable output end connected with the second load is controlled by the control processing module.
The calculation and judgment module 102 is configured to calculate a sum of current values of the output ends of the charging base, and judge whether the sum of current values of the output ends of the charging base is greater than a rated current of the charging base.
And the control processing module 103 is used for controlling and adjusting the current output of the controllable output end and/or the charging end of the adjustable battery when the sum of the current values of the output ends is determined to be larger than the rated current of the charging base, so that the sum of the current values of the output ends of the charging base after adjustment is smaller than or equal to the rated current of the charging base.
In connection with the example of the item shown in fig. 2, the input terminal rated voltage is 5V and the input terminal rated current is 4A. The charging behavior of the first load (Dev 1) is not controlled by the charging base, the voltage at full load is 5V/current is 2A, and the charging circuit is designed to be normally open (charging is carried out as long as the charging circuit is connected). The charging behavior of the second load (Dev 2) is not controlled by the charging base, the voltage at full load is 5V/current is 1.5A, and the power supply can be started or cut off.
Specifically, in the practical application scenario, when the rated current of the input end is 4A, if the maximum charging currents of the first load and the second load exceed 4A, the design circuit cannot be used, and the power adapter should be replaced to meet the maximum charging current.
Specifically, the charge response time of the Dev2 and the charge efficiency of the Battery are balanced, so that the actual application requirements can be met.
The core of the design is that single or any two are not overloaded, but three paths of simultaneous full charge are possible. In the event of a three-way full charge overload, the design reduces the controllable battery charge current to the detriment.
In theory, both Dev1 and Dev2 can be controlled by a simple switching circuit, but the current is not turned off when the current is insufficient, but is turned off normally, and the timing is used for checking whether the charging needs to be turned on. The design is in essence a compromise (sacrifice) of Dev2 response time and a limitation of Battery charging capability. On the one hand, only Dev2 is currently required to be compromised as a product. As a model there are Dev2 and Battery that need to be compromised, and Dev1 without any compromise, which can also cover wider applications.
In addition, can realize charging a plurality of batteries, design a plurality of charging circuits that can break off: but the utility of this circuit is reduced if too many devices need to be balanced. The reduced availability to some extent requires a reverse of whether the original design is reasonable and then readjustment of the circuit control.
According to the invention, under the condition that the maximum rated power of the charging base adapter is certain, when a plurality of loads need to be charged simultaneously, and the controllable battery charging condition is included, an balanced charging scheme is provided, so that overload is avoided, and the charging efficiency of the battery and other equipment is ensured to the maximum extent.
In one embodiment, the present invention provides a power distribution system of a charging base, wherein a control processing module includes:
and the detection submodule is used for detecting whether the output current of the controllable output end is larger than the preset charging current or not when the sum of the current values of the output ends is judged to be larger than the rated current of the charging base.
In an embodiment, the second load (Dev 2) is charged by default to be turned off, and after ns (n seconds) time interval, the second load (Dev 2) is periodically enabled to be charged to check whether the second load (Dev 2) needs to be charged, and the maximum charging current of the Battery (Battery) is limited to 0.5A (the first preset charging current) before the second load (Dev 2) is enabled to be charged; at any time, the charging current of the whole circuit does not exceed 4A.
Illustratively, it is necessary to further detect the charging currents of the first load (Dev 1) and the second load (Dev 2). If the charging current of the second load (Dev 2) is greater than the threshold value (preset charging current), it is determined that the second load (Dev 2) needs to be charged.
And the calculating sub-module is used for calculating the maximum output current of the charging end of the adjustable battery according to the current value of the fixed output end, the current value of the controllable output end and the rated current value of the input end of the charging base when the output current of the controllable output end is larger than the preset charging current.
By way of example, the maximum output current of the Battery charging terminal, i.e. the maximum charge current actually allocated to the Battery (Battery), can then be calculated by summing the charge currents of the first load (Dev 1) and the second load (Dev 2).
And the operation processing sub-module is used for adjusting the output current of the adjustable battery charging end according to the calculated maximum output current of the adjustable battery charging end.
Specifically, the output current of the charging end of the adjustable battery is adjusted to the calculated maximum output current of the charging end of the adjustable battery.
In one embodiment, the calculating submodule calculates the maximum output current of the charging end of the adjustable battery according to the current value of the fixed output end, the current value of the controllable output end and the rated current value of the input end of the charging base, and the calculating submodule specifically comprises:
the calculation sub-module calculates and obtains the maximum output current distributed to the charging end of the adjustable battery through the following formula;
(I 3 ) max ＝min[(I 0 -I 1 -I 2 )，I s3 ]；
wherein I is 3 For the output current allocated to the charging end of the adjustable battery; i 0 Rated current for an input end; i 1 The current value of the output end is fixed; i 2 The current value of the controllable output end; i s3 Is the rated current value of the charging end of the adjustable battery.
I is that 3 For the output current distributed to the charging end of the adjustable battery, (I) 3 ) max For maximum output current allocated to the charging side of the adjustable battery.
In connection with the example of the item shown in fig. 2, the input terminal rated voltage is 5V and the input terminal rated current is 4A. The charging behavior of the first load (Dev 1) is not controlled by the charging base, the voltage at full load is 5V/current is 2A, and the charging circuit is designed to be normally open (charging is carried out as long as the charging circuit is connected). The charging behavior of the second load (Dev 2) is not controlled by the charging base, the voltage at full load is 5V/current is 1.5A, and the power supply can be started or cut off.
Specifically, in the practical application scenario, when the rated current of the input end is 4A, if the maximum charging currents of the first load and the second load exceed 4A, the design circuit cannot be used, and the power adapter should be replaced to meet the maximum charging current.
The Battery uses a special charging chip (Charger), and the base can control the current and the voltage of the Battery through a micro control unit (Microcontroller Unit; MCU), the normal working voltage is about 4.3V (the Battery is convenient to understand and can be approximately regarded as 5V), and the current is adjustable from 0A to 2A.
It can be seen that the current at full load operation of the first load (Dev 1) is 2A, the current at full load operation of the second load (Dev 2) is 1.5A, and the current at full load operation of the controllable Battery (Battery) is 2A, so that the total current at full load operation is 2a+1.5a+2a=5.5a >4a at the same time.
For example, if the charging current of the second load (Dev 2) is greater than the threshold value (preset charging current), it is determined that the second load (Dev 2) needs to be charged. The maximum charging current actually allocated to Battery can be calculated to be the minimum between 2A (the rated current value of the input terminal of the charging base) and 4-I1-I2 by summing the first load and the second load (Dev 2) currents, i.e., the current value of the fixed output terminal, the current value of the controllable output terminal, and the rated current value of the input terminal of the charging base, i.e.:
min[(4-I 1 -I 2 )A，2A]
wherein 4A is the rated current of the input terminal.
The power supply is balanced through the switch control of charging the second load (Dev 2) and the control adjustment of charging current and voltage of the controllable Battery (Battery), so that the circuit is ensured not to be overloaded at any time, and the charging efficiency of all devices or batteries is met.
In one embodiment, the operation processing sub-module is further configured to close the charging circuit of the controllable output terminal when the output current of the controllable output terminal is less than a preset charging current.
Specifically, if the charging current of the second load (Dev 2) is smaller than the threshold value, it is determined that the second load (Dev 2) does not need to be charged, and the charging terminal of the second load (Dev 2) is disconnected. So that the controllable battery and the first load (Dev 1) can be charged at the same time with a maximum full load.
In one embodiment, the calculating sub-module is further configured to calculate, when the charging circuit of the controllable output terminal is turned off, a maximum output current allocated to the charging terminal of the adjustable battery based on the current value of the fixed output terminal, the rated current value of the charging terminal of the adjustable battery, and the rated current of the input terminal of the charging base, as:
(I 3 ) max ＝min[(I 0 -I 1 )，I s3 ]
wherein I is 3 For the output current allocated to the charging end of the adjustable battery; i 0 Rated current is input into the charging base; i 1 The current value of the output end is fixed; i s3 Is the rated current value of the charging end of the adjustable battery.
Specifically, when the charging end of the second load (Dev 2) is disconnected, the maximum output current reassigned to the controllable battery is calculated so that the controllable battery and the first load (Dev 1) can be charged at the maximum full load at the same time.
In one embodiment, the calculating sub-module is further configured to calculate, when the charging circuit of the controllable output terminal is turned off, an output current allocated to the charging terminal of the adjustable battery based on a real-time temperature according to the charging base and a temperature of the battery, specifically:
(I 3 ) max ＝min((I 0 -I 1 )，I s3 ，I batt ，I b1 )；
wherein I is 3 For the output current allocated to the charging end of the adjustable battery; i 0 Rated current is input into the charging base; i 1 The current value of the output end is fixed; i batt A charging current limiting value corresponding to the real-time temperature of the battery; i b1 A charging current limiting value corresponding to the real-time temperature of the charging base; i s3 Is the rated current value of the charging end of the adjustable battery.
Specifically, in practical situations, the charging voltage and charging current of the controllable battery may also be limited by the temperature of the battery itself and the temperature of the motherboard. Therefore, the real-time temperature of the charging base and the temperature of the battery are also considered, and the output current distributed to the charging end of the adjustable battery is recalculated, so that the reduction of the charging efficiency of the adjustable battery is avoided.
In one embodiment, further comprising:
and the control processing module is also used for closing the controllable output end according to a default instruction.
And the timing triggering module is used for triggering and opening the controllable output end at fixed time when the controllable output end is in the closed state.
Specifically, in this embodiment, after the controllable output end is turned off according to a default instruction, the charging base is controlled by the timing trigger to enter a timing trigger state, so that the second load is enabled to be charged, and further, whether the second load needs to be charged at this time is determined based on the threshold value and the charging current of the second load.
In one embodiment, the present invention provides a power distribution method of a charging base, as shown in fig. 3, including:
s101, collecting current values of current output ends of a charging base; the output of charging base includes: a fixed output terminal, a controllable output terminal, and an adjustable battery charging terminal; wherein the fixed output end is set to be in a normally open mode; the opening or closing of the controllable output end is controlled by the control processing module; the output current of the charging end of the adjustable battery is controlled by the control processing module.
S102, calculating the sum of the current values of the output ends of the charging base, and judging whether the sum of the current values of the output ends of the charging base is larger than the rated current of the charging base.
And S103, when the sum of the current values of the output ends is judged to be larger than the rated current of the charging base, controlling and adjusting the current output of the controllable output end and/or the charging end of the adjustable battery so that the sum of the current values of the output ends of the charging base after adjustment is smaller than or equal to the rated current of the charging base.
Specifically, the state of charge machine includes:
S1(each slot，Dev2EN＝＝0)
1.(I 3 ) max ＝min(2A，I temp_batt ，I temp_b1 )
2.V temp_batt and (5) actually adjusting according to the temperature.
And triggering an ns timer, and setting n.
S2 (timer timing trigger state for judging whether Dev2 needs to be charged)
1.(I 3 ) max ＝min(0.5A，I temp_batt ，I temp_b1 )
2.V temp_batt And (5) actually adjusting according to the temperature.
Dev2 en= 1, dev2 charge is turned on.
4. Let the circuit settle and the relevant ADC acquisition complete, if I 2 <100mA，Dev2EN＝＝0。
I 2 >＝100mA，UHFEN＝＝01
S3(each slot，I 2 >Dev2 en= 1, dev2 is an underfill state =100 ma
1.(I 3 ) max ＝min(2A，4A-I 1 -I 2 ，I temp_batt ，I temp_b1 )
2.V temp_batt And (5) actually adjusting according to the temperature.
3. If I 2 <100mA, indicating that Dev2 does not need to be recharged, let Dev2 en= 0.
Returns to S1 when Dev2 en= 0.
Wherein (I) 3 ) max A current limit value of the charging current denoted as charge; i temp_batt A battery temperature-dependent charge current limit value; i temp_b1 For a charging current limit determined by the temperature of the motherboard 1A flow value; v (V) temp _ batt Is a charge voltage limit value determined by the temperature of the battery.
The input is rated, for example, at 5V/4A. The device Dev1 charging behavior is not controlled by the base, 5V/2A is designed to be normally open (charging is carried out as long as the charging is carried out). The device Dev2 charging behavior is not controlled by the base, and the design can start or cut off power supply at 5V/1.5A under full load.
In connection with practical applications, dev1 is normally open, dev2 is simply switchable, and Battery is adjustable. Although the voltage and current on Dev1 and Dev2 can be monitored to control the current of Battery to regulate the current, there is a concern that the real-time is not good enough, i.e., there is a concern that Dev1, dev2 may be overloaded at the same time as the insertion moment. So the S2 state is designed, the Dev2 is turned off first, the current of the Battery is kept at safe 0.5A, and then the Battery current is slowly released to enable the Battery to enter the S3 state.
The charging behavior of Dev2 is controlled by its built-in chip, and the non-base is controllable. The base is provided with a power switch as a simple control of the charging switch, and the purpose of the base is to turn off charging under uncertain conditions so as to ensure that the whole circuit is not overloaded. The Battery uses a special charging chip Charger, and the base can control the current and the voltage of the Battery through the MCU, the normal working voltage is about 4.3V (the Battery is convenient to understand and can be approximately regarded as 5V), and the current is adjustable from 0A to 2A. It can be seen that the current at full load operation, dev1 is 2A, dev2 is 1.5a, and battery is 2A, so that at the same time at full load operation 2a+1.5a+2a=5.5a >4a.
The power supply is balanced through the switch control of the Dev2 charging and the control adjustment of the Battery charging current and voltage, so that the circuit is ensured not to be overloaded at any time, and the charging efficiency of all devices or batteries is met.
Exemplary, as shown in fig. 2, project examples specifically include:
dev2 charging is turned off by default, after ns (n seconds) time intervals, dev2 charging is enabled periodically to check whether Dev2 needs charging or not, and the maximum Battery charging current is limited by 0.5A before Dev2 charging is enabled; at any time, the charging current of the whole circuit does not exceed 4A.
2. The charging currents of Dev1 and Dev2 are detected. If the Dev2 charging current is greater than the threshold value, it is determined that Dev2 needs to be charged, then by summing the Dev1 and Dev2 currents, the maximum charging current actually allocated to Battery can be calculated as taking the minimum value between 2A and 4-I1-I2, i.e., MIN (2A, 4-I1-I2).
If the Dev2 charging current is smaller than the threshold value, the Dev2 is determined to be not required to be charged, and then the Dev2 is disconnected from charging. So that the battery and Dev1 can be charged at the maximum full load at the same time. (in practice the charging voltage and charging current of a battery are also limited by the battery temperature and the motherboard temperature.)
The core of the design is that single or any two are not overloaded, but three paths of simultaneous full charge are possible. In the event of a three-way full charge overload, the design reduces the controllable battery charge current to the detriment.
In theory, both Dev1 and Dev2 can be controlled by a simple switching circuit, but the current is not turned off when the current is insufficient, but is turned off normally, and the timing is used for checking whether the charging needs to be turned on. The design is in essence a compromise of Dev2 response time and a limitation of Battery charging capability. On the one hand, only Dev2 is currently required to be compromised as a product. As a model there are Dev2 and Battery that need to be compromised, and Dev1 without any compromise, which can also cover wider applications.
In addition, can realize charging a plurality of batteries, design a plurality of charging circuits that can break off: but the utility of this circuit is reduced if too many devices need to be balanced. The reduced availability to some extent requires a reverse of whether the original design is reasonable and then readjustment of the circuit control.
3. The value of n is tested and adjusted. The larger n, the less time the Battery is constrained to 0.5A, but the slower the reaction to detect that Dev2 needs to be charged; conversely, the smaller n is, the more time the Battery is constrained to 0.5A, but the faster the detection of Dev2 requires charging.
4. The following is a particular supplementary explanation: at the beginning of the design, three states S1, S2, and S3 were designed for concern of full charge of Dev1, dev2, and Battery at the same time. Consider the case where Battery is being charged at full charge 2A, where Dev1 is plugged in at the same time, dev2 also requires full charge. Although the current of Dev1 and Dev2 is monitored in real time, there is concern that the real-time performance is not good enough, and the condition of instantaneous overload of the current may damage a charging circuit or cause abnormal operation of a power adapter.
The S2 state is designed for safety, the Battery is forced to work at 0.5A, then the Dev2 charging is started, and after the circuit is stable, the Battery is allowed to enter S3 to slowly release the charging limit of the Battery.
The actual test verification of the later-stage product shows that the real-time performance of the target product for current control is good enough, the hardware circuit and the power adapter are strong enough, the actual product is in the S3 state of canceling two states of S1 and S2, namely the whole circuit is always in the state of opening the charge of Dev2 and the real-time regulation of the Battery charge.
However, the state control of the three sections of the original S1, S2 and S3 is still significant, and is the safest power supply equalization mode. The way that the current product takes S3 only can be seen as a special case or subset of this power balancing scheme.
In one embodiment, when it is determined that the sum of the current values of the output terminals is greater than the rated current of the charging base, controlling to adjust the current output of the controllable output terminal and/or the adjustable battery charging terminal so that the sum of the current values of the output terminals of the adjusted charging base is less than or equal to the rated current of the charging base, specifically including:
and when the sum of the current values of the output ends is judged to be larger than the rated current of the charging base, detecting whether the output current of the controllable output end is larger than the preset charging current or not.
When the output current of the controllable output end is larger than the preset charging current, calculating the maximum output current of the charging end of the adjustable battery according to the current value of the fixed output end, the current value of the controllable output end and the rated current value of the input end of the charging base.
And adjusting the output current of the charging end of the adjustable battery according to the calculated maximum output current of the charging end of the adjustable battery.
And when the output current of the controllable output end is smaller than the preset charging current, closing the charging circuit of the controllable output end.
The power supply is balanced through the switch control of the Dev2 charging and the control adjustment of the Battery charging current and voltage, so that the circuit is ensured not to be overloaded at any time, and the charging efficiency of all devices or batteries is met.
In one embodiment, the present invention provides a power distribution method of a charging base, further comprising the steps of:
setting the controllable output terminal to a default closing mode; when the controllable output end is in a closed state, the controllable output end is triggered to be opened at fixed time.
Specifically, in this embodiment, after the controllable output end is turned off according to a default instruction, the charging base is controlled by the timing trigger to enter a timing trigger state, so that the second load is enabled to be charged, and further, whether the second load needs to be charged at this time is determined based on the threshold value and the charging current of the second load.
In the foregoing embodiments, the descriptions of the embodiments are focused on, and the parts of a certain embodiment that are not described or depicted in detail may be referred to in the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/electronic device and method may be implemented in other manners. The apparatus/electronic device embodiments described above are exemplary only, and exemplary, the division of modules or elements is merely a logical function division, and there may be additional divisions in actual implementation, and exemplary, multiple elements or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
It should be noted that the above embodiments can be freely combined as needed. The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (9)
1. A power distribution system for a charging dock, comprising:
the current acquisition module is used for acquiring current values of all output ends of the current charging base; the output end of the charging base comprises: a fixed output terminal, a controllable output terminal, and an adjustable battery charging terminal; wherein the fixed output end is set to be in a normally open mode; the opening or closing of the controllable output end is controlled by a control processing module; the magnitude of the output current of the adjustable battery charging end is controlled by the control processing module;
the calculation judging module is used for calculating the sum of the current values of the output ends of the charging base and judging whether the sum of the current values of the output ends of the charging base is larger than the rated current of the charging base or not;
the control processing module is used for controlling and adjusting the current output of the controllable output end and/or the charging end of the adjustable battery when the sum of the current values of the output ends is judged to be larger than the rated current of the charging base, so that the sum of the current values of the output ends of the charging base after adjustment is smaller than or equal to the rated current of the charging base;
the control processing module includes:
the detection submodule is used for detecting whether the output current of the controllable output end is larger than a preset charging current or not when the sum of the current values of the output ends is judged to be larger than the rated current of the charging base;
the calculating sub-module is used for calculating the maximum output current of the adjustable battery charging end according to the current value of the fixed output end, the current value of the controllable output end and the rated current value of the input end of the charging base when the output current of the controllable output end is larger than the preset charging current;
and the operation processing sub-module is used for adjusting the output current of the adjustable battery charging end according to the calculated maximum output current of the adjustable battery charging end.
2. The power distribution system of claim 1, wherein the calculating submodule calculates the maximum output current of the adjustable battery charging terminal according to the current value of the fixed output terminal, the current value of the controllable output terminal, and the rated current value of the input terminal of the charging base, and the calculating submodule specifically includes:
the calculating submodule calculates and obtains the maximum output current distributed to the charging end of the adjustable battery through the following formula;
(I 3 ) max ＝min[(I 0 -I 1 -I 2 )，I s3 ]；
wherein I is 3 For an output current allocated to the charging terminal of the adjustable battery; i 0 Rated current for an input end; i 1 The current value of the output end is fixed; i 2 The current value of the controllable output end; i s3 And rated current value of the charging end of the adjustable battery is obtained.
3. A power distribution system for a charging dock as claimed in claim 1, wherein,
the operation processing sub-module is further configured to close the charging circuit of the controllable output terminal when the output current of the controllable output terminal is smaller than a preset charging current.
4. A power distribution system for a charging dock as claimed in claim 3, wherein,
the calculating submodule is further configured to calculate, when the charging circuit of the controllable output terminal is turned off, a maximum output current allocated to the charging terminal of the adjustable battery based on the current value of the fixed output terminal, the rated current value of the charging terminal of the adjustable battery, and the rated current of the input terminal of the charging base, as follows:
(I 3 ) max ＝min[(I 0 -I 1 )，I s3 ]
wherein I is 3 For an output current allocated to the charging terminal of the adjustable battery; i 0 Rated current is set for the input end of the charging base; i 1 A current value for the fixed output; i s3 And rated current value of the charging end of the adjustable battery is obtained.
5. A power distribution system for a charging dock as claimed in claim 3, wherein,
the calculation submodule is also used for, when the charging circuit of the controllable output end is closed, based on the charging baseCalculating output current distributed to the charging end of the adjustable battery according to the real-time temperature and the temperature of the battery, wherein the output current is specifically as follows: (I) 3 ) max ＝min((I 0 -I 1 )，I s3 ，I batt ，I b1 )；
Wherein I is 3 For an output current allocated to the charging terminal of the adjustable battery; i 0 Rated current is set for the input end of the charging base; i 1 A current value for the fixed output; i batt A charging current limiting value corresponding to the real-time temperature of the battery; i b1 A charging current limiting value corresponding to the real-time temperature of the charging base; i s3 And rated current value of the charging end of the adjustable battery is obtained.
6. The charging dock power distribution system of any one of claims 1-5, further comprising:
the control processing module is also used for closing the controllable output end according to a default instruction;
and the timing triggering module is used for triggering and opening the controllable output end at fixed time when the controllable output end is in a closed state.
7. A method for power distribution of a charging base, comprising:
collecting current values of current output ends of the charging base; the output end of the charging base comprises: a fixed output terminal, a controllable output terminal, and an adjustable battery charging terminal; wherein the fixed output end is set to be in a normally open mode; the opening or closing of the controllable output end is controlled by a control processing module; the magnitude of the output current of the adjustable battery charging end is controlled by the control processing module;
calculating the sum of the current values of all the output ends of the charging base, and judging whether the sum of the current values of all the output ends of the charging base is larger than the rated current of the charging base or not;
when the sum of the current values of the output ends is judged to be larger than the rated current of the charging base, controlling and adjusting the current output of the controllable output end and/or the charging end of the adjustable battery, so that the sum of the current values of the output ends of the charging base after adjustment is smaller than or equal to the rated current of the charging base;
when the sum of the current values of the output ends is determined to be greater than the rated current of the charging base, controlling and adjusting the current output of the controllable output end and/or the charging end of the adjustable battery so that the sum of the current values of the output ends of the charging base after adjustment is less than or equal to the rated current of the charging base, wherein the method specifically comprises the following steps:
when the sum of the current values of the output ends is judged to be larger than the rated current of the charging base, detecting whether the output current of the controllable output end is larger than a preset charging current or not;
when the output current of the controllable output end is larger than the preset charging current, calculating the maximum output current of the adjustable battery charging end according to the current value of the fixed output end, the current value of the controllable output end and the rated current value of the input end of the charging base;
and adjusting the output current of the charging end of the adjustable battery according to the calculated maximum output current of the charging end of the adjustable battery.
8. The method for distributing power to a charging base according to claim 7, wherein when it is determined that the sum of the current values of the output terminals is greater than the rated current of the charging base, controlling and adjusting the current output of the controllable output terminal and/or the charging terminal of the adjustable battery so that the sum of the current values of the output terminals of the charging base after adjustment is less than or equal to the rated current of the charging base, specifically comprises:
and when the output current of the controllable output end is smaller than the preset charging current, closing the charging circuit of the controllable output end.
9. The power distribution method of a charging base according to claim 7 or 8, further comprising the steps of:
setting the controllable output end to a default closing mode;
and when the controllable output end is in a closed state, the controllable output end is triggered to be opened at fixed time.
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