CN112737336B - Voltage transformation module, charger, charging system and voltage transformation control method - Google Patents
Voltage transformation module, charger, charging system and voltage transformation control method Download PDFInfo
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- CN112737336B CN112737336B CN202011582635.9A CN202011582635A CN112737336B CN 112737336 B CN112737336 B CN 112737336B CN 202011582635 A CN202011582635 A CN 202011582635A CN 112737336 B CN112737336 B CN 112737336B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/1213—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for DC-DC converters
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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
- H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
- H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
- H02J7/007194—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature of the battery
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a transformation module, a charger, a charging system and a transformation control method, wherein the transformation module comprises: a transformer including an input portion and an output portion corresponding to the input portion; the primary side circuit is connected with the input part and comprises an input port for acquiring external power and a PWM (pulse width modulation) circuit; a secondary side circuit connected to the output section and including an output port for outputting power to a load; and the control unit is communicated with the load to acquire voltage information of the load and controls the PWM modulation circuit to work according to the voltage information so as to enable the voltage output by the output port to be matched with the load. Compared with the prior art, the voltage transformation module can automatically control the secondary side circuit to output the voltage matched with the load according to the voltage information of the load, so that the application range of the voltage transformation module is wider, and the use and maintenance cost of a user is reduced.
Description
Technical Field
The invention relates to a transformation module, a charger, a charging system and a transformation control method.
Background
With the development of economy, household electric tools have entered thousands of households. Even more, many users have multiple power tools simultaneously, such as: blowers, chain saws, electric drills, and the like. Typically, the voltage of the battery packs varies from one power tool configuration to another. Some power tools have a battery pack with a voltage of 20V and some power tools have a battery pack with a voltage of 36V. This requires a user to equip each type of battery pack with a charger, thereby increasing the user's use and maintenance costs. Moreover, because of the large number of types of chargers, a user can easily and mistakenly butt-joint a charger with one voltage with a battery pack with another voltage, and damage is caused to the battery pack and the charger.
In view of the above problems, it is desirable to provide a new transformer module to solve the above problems.
Disclosure of Invention
The invention aims to provide a transformation module which can automatically control a secondary side circuit to output a voltage matched with a load according to voltage information of the load, so that the application range of the transformation module is wider, and the use and maintenance cost of a user is reduced.
In order to achieve the above object, the present invention provides a transformer module, including: a transformer including an input portion and an output portion corresponding to the input portion; the primary side circuit is connected with the input part and comprises an input port for acquiring external power and a PWM (pulse width modulation) circuit; a secondary side circuit connected to the output section, the secondary side circuit including an output port for outputting power to a load; and the control unit is communicated with the load to acquire voltage information of the load and controls the PWM modulation circuit to work according to the voltage information so as to enable the voltage output by the output port to be matched with the load.
As a further improvement of the invention, the control unit communicates with the load to obtain the temperature information of the load and controls the PWM modulation circuit to work according to the temperature information, so that the current output by the output port is matched with the load.
As a further improvement of the present invention, the control unit includes a processor, a detection circuit, and a signal transmission circuit; the detection circuit is used for detecting the output voltage of the output port; and the processor sends out a control signal according to the output voltage of the output port and transmits the control signal to the PWM modulation circuit through the signal transmission circuit.
As a further improvement of the present invention, the detection circuit includes a voltage detection circuit that detects an output voltage of the output port and a current detection circuit that detects an output current of the output port; the control unit is communicated with the load to acquire current information of the load, sends out control signals according to the voltage information and the current information of the load, the output voltage of the output port and the output current of the output port, and transmits the control signals to the PWM circuit through the signal transmission circuit.
As a further improvement of the invention, the signal transmission circuit is a photoelectric coupler.
As a further improvement of the invention, the control unit communicates with the load to obtain a maximum voltage that the load can withstand; the control unit also comprises a secondary overvoltage detection circuit; when the secondary overvoltage detection circuit detects that the voltage of the load is larger than the maximum voltage, the secondary overvoltage detection circuit controls the secondary side circuit to stop outputting the power.
As a further improvement of the invention, the control unit communicates with the load to obtain a maximum current that the load can withstand; the control unit also comprises a secondary overcurrent detection circuit; and when the secondary overcurrent detection circuit detects that the current of the load is greater than the maximum current, the secondary overcurrent detection circuit controls the secondary side circuit to stop outputting the power.
As a further improvement of the present invention, the transformer module further includes a power supply unit for supplying power to the PWM modulation circuit and the control unit, and the power supply connected to the input port is independent from the power supply unit or the power supply unit is connected to the input portion of the transformer.
As a further improvement of the present invention, the output port includes a conductive terminal and a communication terminal, and the control unit communicates with the load through the communication terminal.
The invention also discloses a charger which comprises a power interface and the voltage transformation module, wherein the input port of the voltage transformation module is electrically connected with the power interface.
The invention also discloses a charging system which comprises the charger and the battery pack.
The invention also discloses a variable voltage control method, which comprises the following steps: s1: communicating with a load to obtain voltage information of the load; s2: and PWM modulation is carried out on the primary side circuit, so that the secondary side circuit outputs a voltage matched with the load.
As a further improvement of the present invention, the voltage transformation control method further includes step S3: detecting the output voltage of the secondary side circuit; the control unit sends a control signal to the PWM modulation circuit according to the voltage information of the load and the output voltage of the secondary side circuit so as to control the PWM modulation circuit to modulate the primary side circuit.
As a further improvement of the present invention, the voltage transformation control method further includes step S4: communicating with a load to obtain temperature information of the load; and the control unit sends control information to the PWM modulation circuit according to the temperature information so as to control the PWM modulation circuit to modulate the primary circuit.
As a further improvement of the present invention, the step S4 further includes: detecting the output current of the secondary side circuit; and the control unit sends control information to the PWM modulation circuit according to the temperature information of the load and the output current of the secondary side circuit so as to control the PWM modulation circuit to modulate the primary side circuit.
The invention has the beneficial effects that: the voltage transformation module can automatically control the secondary side circuit to output the voltage matched with the load according to the voltage information of the load, so that the application range of the voltage transformation module is wider, and the use and maintenance cost of a user is reduced.
Drawings
Fig. 1 is a schematic block diagram of a transformer module according to the present invention.
Fig. 2 is a block schematic diagram of a detection circuit.
Fig. 3 is a block diagram of a secondary overcurrent and overvoltage detection circuit.
Fig. 4 is a perspective view of the charger of the present invention.
Fig. 5 is a perspective view of the charging system of the present invention.
Fig. 6 is a flow chart of a voltage transformation control method of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, the present invention discloses a transformer module 100, which includes a transformer 10, a primary side circuit 20 connected to the transformer 10, a secondary side circuit 30 connected to the transformer 10, a control unit 40, and a power supply unit 50.
Referring to fig. 1, the transformer 10 includes an input portion (not shown) and an output portion (not shown) corresponding to the input portion. Preferably, the transformer 10 is an isolation transformer. The primary side circuit 20 is connected to the input part, and includes an input port 21, an input rectifying and filtering circuit 22, and a PWM modulation circuit 23. The input port 21 is used for obtaining external power, such as alternating current. The input rectifying/smoothing circuit 22 rectifies and smoothes the electric power received at the input port 21, and outputs the rectified and smoothed electric power to the input unit. The PWM modulation circuit 23 is configured to modulate the input rectifying and filtering circuit 22, and achieve the purpose of controlling the output voltage and the output current of the primary side circuit 20 by adjusting the period of PWM and the duty ratio of PWM. The secondary side circuit 30 is connected to the output unit, and includes a diffusion rectifier filter output circuit 31 and an output port 32. The rectifying and filtering output circuit 31 is used for rectifying and filtering the power output by the output part of the transformer 10 and transmitting the power to the output port 32. The output port 32 is used to output power to a load. The output port 32 includes a conductive terminal 321 that outputs power and a communication terminal 322.
Referring to fig. 1, the control unit 40 communicates with a load to obtain voltage information of the load, and controls the PWM modulation circuit 23 to operate according to the voltage information, so that the voltage output from the output port 32 matches the load. Further, the control unit 40 communicates with a load to obtain temperature information of the load, and controls the PWM modulation circuit 23 to operate according to the temperature information, so that the current output from the output port 32 matches the load.
Specifically, the control unit 40 includes a processor 41, a detection circuit 42, a signal transmission circuit 43, and a secondary overcurrent and overvoltage detection circuit 44. In this embodiment, the processor 41 is a Micro Control Unit (MCU) and communicates with the load through the communication terminal 322. Referring to fig. 2, the detection circuit 42 includes a voltage detection circuit 421 for detecting the output voltage of the output port 32 and a current detection circuit 422 for detecting the output current of the output port 32. The processor 41 sends out a control signal according to the voltage information of the load, the temperature information, the output voltage of the output port 32 and the output current of the output port 32, and transmits the control signal to the PWM modulation circuit 23 through the signal transmission circuit. The signal transmission circuit 43 is used for transmitting the signal sent by the processor 41 to the PWM modulation circuit 23. In order to avoid interference of the own current, voltage, etc. of the processor 41 on the PWM modulation circuit 23, the signal transmission circuit 43 is preferably an isolated signal transmission circuit, such as: a photoelectric coupler. Referring to fig. 3, the secondary overcurrent and overvoltage detection circuit 44 includes a secondary overvoltage detection circuit 441 for detecting the load voltage and a secondary overcurrent detection circuit 442 for detecting the load current. Further, the processor 41 communicates with the load to obtain a maximum voltage and a maximum current that the load can withstand. When the secondary overvoltage detection circuit 441 detects that the voltage of the load is greater than the maximum voltage, the secondary overvoltage detection circuit 441 controls the secondary circuit 30 to stop outputting electric power. When the secondary overcurrent detecting circuit 442 detects that the current of the load is larger than the maximum current, the secondary overcurrent detecting circuit 442 controls the secondary circuit 30 to stop outputting the electric power.
Referring to fig. 1, the power supply unit 50 is used for supplying power to the PWM modulation circuit 23 and the control unit 40. Preferably, the power supply unit 50 and the power supply connected to the input port 21 are independent of each other, namely: the PWM modulation circuit 23, the control unit 40, and the input port 21 do not share a power supply. By the arrangement, the operation of the transformer module 100 is more reliable and stable, and the overall stability of the transformer module 100 can be effectively improved. Secondly, because the independent power supply unit 50 is used, the circuits of the active power part can be completely shut down and stopped in the standby condition, so as to reduce the power consumption and increase the safety performance of the product. In other embodiments, the power supply unit 50 may be further configured to be connected to an input of the transformer 10 to obtain power. In another embodiment, the power supply unit 50 may be further configured to be connected to the input rectifying and filtering circuit 22 to obtain power.
Compared with the prior art, the voltage transformation module 100 of the present invention can automatically control the secondary side circuit 30 to output the voltage matched with the load according to the voltage information of the load, so that the application range of the voltage transformation module 100 is wider, and the use and maintenance cost of the user is reduced.
Referring to fig. 4, the present invention further discloses a charger 200, which includes a housing 201, a power interface 202 and the transformer module 100. The power interface 202 is disposed on a sidewall of the housing 201, and is used for obtaining external power, for example: an alternating current. The transformer module 100 is accommodated in the housing 201. The input port 21 of the transformer module 100 is electrically connected to the power interface 202, so that the transformer module 100 can obtain external power through the power interface 202.
Referring to fig. 5, the present invention further discloses a charging system 300, which includes the charger 200 and a battery pack 301 cooperating with the charger 200. The battery pack 301 is the aforementioned load. When the charging system 300 is used, when the temperature of the battery pack 301 is higher than the charging temperature threshold, the control unit 40 sends a control signal to the PWM modulation circuit 23, and the PWM modulation circuit 23 modulates the primary side circuit 20, so that the output port 32 outputs a first current; when the temperature of the battery pack 301 is lower than the charging temperature threshold, the control unit 40 sends a control signal to the PWM modulation circuit 23, and the PWM modulation circuit 23 modulates the primary side circuit 20, so that the output port 32 outputs a second current; wherein the second current is greater than the first current.
Referring to fig. 6, the present invention further discloses a voltage transformation control method, which includes the following steps:
s1: and communicating with the load to obtain voltage information of the load.
S2: and PWM modulation is carried out on the primary side circuit, so that the secondary side circuit outputs voltage matched with the load.
S3: detecting the output voltage of the secondary side circuit; the control unit sends a control signal to the PWM modulation circuit according to the voltage information of the load and the output voltage of the secondary side circuit so as to control the PWM modulation circuit to modulate the primary side circuit.
S4: communicating with a load to obtain temperature information of the load; and the control unit sends control information to the PWM modulation circuit according to the temperature information so as to control the PWM modulation circuit to modulate the primary circuit.
Further, the step S4 further includes: detecting the output current of the secondary side circuit; and the control unit sends control information to the PWM modulation circuit according to the temperature information of the load and the output current of the secondary side circuit so as to control the PWM modulation circuit to modulate the primary side circuit.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.
Claims (12)
1. The utility model provides a vary voltage module is applied to domestic electric tool, its characterized in that includes:
a transformer including an input portion and an output portion corresponding to the input portion;
the primary side circuit is connected with the input part and comprises an input port for acquiring external power and a PWM (pulse-width modulation) circuit;
a secondary side circuit connected to the output section, the secondary side circuit including an output port for outputting power to a load; and
the control unit is communicated with the load to acquire voltage information of the load and controls the PWM modulation circuit to work according to the voltage information so as to enable the voltage output by the output port to be matched with the load;
the control unit is communicated with the load to acquire the temperature information of the load, and controls the PWM modulation circuit to work according to the temperature information, so that the current output by the output port is matched with the load.
2. The transformer module of claim 1, wherein: the control unit comprises a processor, a detection circuit and a signal transmission circuit; the detection circuit is used for detecting the output voltage of the output port; and the processor sends out a control signal according to the output voltage of the output port and transmits the control signal to the PWM modulation circuit through the signal transmission circuit.
3. The transformer module of claim 2, wherein: the detection circuit comprises a voltage detection circuit for detecting the output voltage of the output port and a current detection circuit for detecting the output current of the output port; the control unit is communicated with the load to acquire current information of the load, sends out control signals according to the voltage information and the current information of the load, the output voltage of the output port and the output current of the output port, and transmits the control signals to the PWM circuit through the signal transmission circuit.
4. The transformation module of claim 2, wherein: the signal transmission circuit is a photoelectric coupler.
5. The transformation module of claim 1, wherein: the control unit is communicated with the load to obtain the maximum voltage which can be borne by the load; the control unit also comprises a secondary overvoltage detection circuit; when the secondary overvoltage detection circuit detects that the voltage of the load is larger than the maximum voltage, the secondary overvoltage detection circuit controls the secondary side circuit to stop outputting the power.
6. The transformer module of claim 1, wherein: the control unit is communicated with the load to obtain the maximum current which can be borne by the load; the control unit also comprises a secondary overcurrent detection circuit; when the secondary overcurrent detection circuit detects that the current of the load is larger than the maximum current, the secondary overcurrent detection circuit controls the secondary side circuit to stop outputting the electric power.
7. The transformer module of claim 1, wherein: the transformation module further comprises a power supply unit for supplying power to the PWM modulation circuit and the control unit, and a power supply connected with the input port is mutually independent of the power supply unit or the power supply unit is connected with the input part of the transformer.
8. The transformation module of claim 1, wherein: the output port comprises a conductive terminal and a communication terminal, and the control unit communicates with the load through the communication terminal.
9. A charger, comprising:
the power interface is used for acquiring external power; and
the transforming module according to any one of claims 1-8, wherein the input port of the transforming module is electrically connected to the power interface.
10. An electrical charging system, comprising:
a charger according to claim 9 and
a battery pack.
11. A variable voltage control method is characterized by comprising the following steps:
s1: communicating with a load to obtain voltage information of the load;
s2: performing PWM modulation on the primary side circuit to enable the secondary side circuit to output a voltage matched with the load;
s3: detecting the output voltage of the secondary side circuit; the control unit sends a control signal to the PWM modulation circuit according to the voltage information of the load and the output voltage of the secondary side circuit so as to control the PWM modulation circuit to modulate the primary side circuit;
s4: communicating with a load to obtain temperature information of the load; and the control unit sends control information to the PWM modulation circuit according to the temperature information so as to control the PWM modulation circuit to modulate the primary circuit.
12. The voltage transformation control method of claim 11, wherein: the step S4 further includes: detecting the output current of the secondary side circuit; and the control unit sends control information to the PWM modulation circuit according to the temperature information of the load and the output current of the secondary side circuit so as to control the PWM modulation circuit to modulate the primary side circuit.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011582635.9A CN112737336B (en) | 2020-12-28 | 2020-12-28 | Voltage transformation module, charger, charging system and voltage transformation control method |
| CA3195587A CA3195587A1 (en) | 2020-10-16 | 2021-10-14 | Charger, charging device, energy supply device and control method of charger |
| EP21879463.4A EP4229734A4 (en) | 2020-10-16 | 2021-10-14 | Charger, charging device, energy supply device and control method of charger |
| PCT/CN2021/123703 WO2022078420A1 (en) | 2020-10-16 | 2021-10-14 | Charger, charging device, energy supply device and control method of charger |
| US18/295,255 US20230238814A1 (en) | 2020-10-16 | 2023-04-03 | Charger, charging device, energy supply device and control method of charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011582635.9A CN112737336B (en) | 2020-12-28 | 2020-12-28 | Voltage transformation module, charger, charging system and voltage transformation control method |
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| Publication Number | Publication Date |
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| CN112737336A CN112737336A (en) | 2021-04-30 |
| CN112737336B true CN112737336B (en) | 2022-11-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011582635.9A Active CN112737336B (en) | 2020-10-16 | 2020-12-28 | Voltage transformation module, charger, charging system and voltage transformation control method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103460553A (en) * | 2011-01-30 | 2013-12-18 | 海尔集团公司 | Wireless power supply system and load identification and control method thereof |
| CN105529802A (en) * | 2014-09-29 | 2016-04-27 | 南京德朔实业有限公司 | Charging system |
| CN108482152A (en) * | 2018-03-26 | 2018-09-04 | 珠海小可乐科技有限公司 | Portable charger and its controller |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1972066A (en) * | 2005-11-23 | 2007-05-30 | 明基电通股份有限公司 | Charging protection circuit |
| CN101640427B (en) * | 2008-08-01 | 2012-10-24 | 新奥科技发展有限公司 | Photovoltaic off-grid charging system for electric car |
| CN202153656U (en) * | 2011-07-26 | 2012-02-29 | 惠州市德赛视听科技有限公司 | Switch power supply charger |
| CN102315679B (en) * | 2011-09-01 | 2014-07-09 | 河南省交通科学技术研究院有限公司 | Rapid charging circuit with protection circuit |
| CN105162228B (en) * | 2015-09-10 | 2018-08-14 | 深圳市华宝新能源股份有限公司 | Intelligent charger and its charging control circuit |
-
2020
- 2020-12-28 CN CN202011582635.9A patent/CN112737336B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103460553A (en) * | 2011-01-30 | 2013-12-18 | 海尔集团公司 | Wireless power supply system and load identification and control method thereof |
| CN105529802A (en) * | 2014-09-29 | 2016-04-27 | 南京德朔实业有限公司 | Charging system |
| CN108482152A (en) * | 2018-03-26 | 2018-09-04 | 珠海小可乐科技有限公司 | Portable charger and its controller |
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| CN112737336A (en) | 2021-04-30 |
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