CN214255803U

CN214255803U - Charging circuit and charger

Info

Publication number: CN214255803U
Application number: CN202120484331.2U
Authority: CN
Inventors: 宋红军; 王勋; 崔豫川; 庞棋峰
Original assignee: Suzhou Eavision Robotic Technologies Co Ltd
Current assignee: Suzhou Eavision Robotic Technologies Co Ltd
Priority date: 2021-03-05
Filing date: 2021-03-05
Publication date: 2021-09-21
Anticipated expiration: 2031-03-05

Abstract

The utility model provides a charging circuit and charger, which relates to the technical field of unmanned aerial vehicle battery charging, and comprises a household input interface, a generator input interface, a first AC/DC conversion module, a second AC/DC conversion module and a control panel, wherein the control panel comprises a first detection end IO1 and a second detection end IO 2; one end of the first alternating current-direct current conversion module is connected with a first detection end IO1, and the other end of the first alternating current-direct current conversion module is connected with the household input interface; one end of the second alternating current-direct current conversion module is connected with a second detection end IO2, and the other end of the second alternating current-direct current conversion module is connected with the input interface of the generator; the control panel is based on the level state that first sense terminal IO1 and second sense terminal IO2 detected, discerns current power input result, can automatic identification field generator and indoor domestic power to the corresponding charging power of adaptation play.

Description

Charging circuit and charger

Technical Field

The utility model belongs to the technical field of the unmanned aerial vehicle battery charging technique and specifically relates to a charging circuit and charger are related to.

Background

The current unmanned aerial vehicle battery charger is generally applied to outdoor and indoor scenes, a high-power charging is needed when a field generator is used as input, and a low-power safe charging is needed because the load of a household power grid is small (for example, under the safe condition, the Alternating Current (AC) power needs not more than 220V/10A) when the battery returns to the household environment of a user.

The existing product basically has single input, or has no direct current DC selection, namely constant power charging, or needs manual operation and software switching, and is complex in operation and easy to forget conversion, so that danger is caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a charging circuit and charger can the automatic identification field generator input source and indoor domestic electric input source to the corresponding charging power of adaptation play.

In a first aspect, an embodiment of the present invention provides a charging circuit, including a household input interface, a generator input interface, a first ac/dc conversion module, a second ac/dc conversion module, and a control board, where the control board includes a first detection end IO1 and a second detection end IO 2;

one end of the first alternating current-direct current conversion module is connected with the first detection end IO1, and the other end of the first alternating current-direct current conversion module is connected with the household input interface;

one end of the second alternating current-direct current conversion module is connected with the second detection end IO2, and the other end of the second alternating current-direct current conversion module is connected with the generator input interface;

the control board identifies a current power input result based on the level states detected by the first detection terminal IO1 and the second detection terminal IO 2.

With reference to the first aspect, the present invention provides a first possible implementation manner of the first aspect, wherein the control board is further configured to recognize that the current time is a household input result when the first detection terminal IO1 detects a first level and the second detection terminal IO2 detects a second level; when the first detection terminal IO2 detects a first level and the second detection terminal IO1 detects a second level, the generator input result is identified, wherein the first level is a high level or a low level, and the second level is a low level or a high level relative to the first level.

In combination with the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, wherein the control board further includes a charging module connected to the control board, and the control board is further configured to control the charging module to output a first charging power, where the first charging power is obtained based on the power input result, and the first charging power at least includes a household electric charging power and a generator charging power.

In combination with the first aspect, an embodiment of the present invention provides a third possible implementation manner of the first aspect, wherein the third possible implementation manner further includes a temperature sensing element, and is connected to the control board, and the control board is configured to receive the current temperature of the battery sent by the temperature sensing element, and adjust and output a second charging power, where the second charging power at least includes a household electric charging power and a generator charging power.

In combination with the first aspect, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, wherein the charging module is further configured to charge the battery according to the first charging power or the second charging power.

In combination with the first aspect, an embodiment of the present invention provides a fifth possible implementation manner of the first aspect, wherein, be equipped with power module, first MOS switch and second switch on the control panel, the one end of first switch with power module connects, and the other end is connected respectively first alternating current-direct current conversion module with first sense terminal IO1, the one end of second MOS switch with power module connects, and the other end is connected respectively second alternating current-direct current conversion module with second sense terminal IO 2.

In combination with the first aspect, an embodiment of the present invention provides a sixth possible implementation manner of the first aspect, wherein the control board is further configured to control the charging power according to the household input result when the first detecting terminal IO1 detects a high level, the second detecting terminal IO2 also detects a high level, or the first detecting terminal IO1 detects a low level, and the second detecting terminal IO2 also detects a low level.

In combination with the first aspect, an embodiment of the present invention provides a seventh possible implementation manner of the first aspect, wherein the seventh possible implementation manner further includes a setting unit, where the setting unit is disposed on the external shell of the charging circuit, the shell is provided with a fool-proof interface, and the fool-proof interface includes a generator port and a household power source interface.

In combination with the first aspect, an embodiment of the present invention provides an eighth possible implementation manner of the first aspect, wherein, a three-terminal switch is further included, the first path of the three-terminal switch is connected to the household input interface and the first ac/dc conversion module, the second path of the three-terminal switch is connected to the generator input interface and the second ac/dc conversion module, and one end of the third path of the three-terminal switch is connected to the charging module.

In a second aspect, the embodiment of the present invention further provides a charger, including the charging circuit as described above, further including a charger main body, the charger main body is connected to the charging circuit.

The embodiment of the utility model provides a charging circuit and charger have been brought, the IO sense terminal of control panel passes through alternating current-direct current conversion module (AC/DC module) and is connected with the AC input source that corresponds, and through the level height condition of IO sense terminal sampling, the AC input source kind of current input is discerned automatically, improves and uses experience, guarantees charge efficiency.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

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 embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic diagram of a charging circuit according to an embodiment of the present invention.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

At present, input sources are not clearly distinguished by a charger, namely the charger is not easy to distinguish field generators from indoor household power supplies in terms of power phase number, voltage and the like, the charger cannot automatically identify whether the field generators are in a charging scene or the household power supply charging scene at present, the high-power charger can cause overlarge power when charging is carried out in a family environment, the household AC power grid overload can be caused, electric wires generate heat, fire disasters can be caused seriously, or the current of the charger is too small, so that the full-power charging cannot be carried out when the high-power generator charger is used, and the time is wasted.

Based on this, the embodiment of the utility model provides a pair of charging circuit and charger can the automatic identification field generator input source and indoor domestic electric input source to corresponding charging power is gone out in the adaptation.

The following is a detailed description by way of example.

Referring to fig. 1, the charging circuit includes a household input interface, a generator input interface, a first AC/DC conversion module (AC/DC module), a second AC/DC conversion module, and a control board (AC/DC module), where the control board includes a first detection terminal IO1 and a second detection terminal IO 2;

In a preferred embodiment of practical application, an IO detection end of the control board is connected with a corresponding AC input source through an AC-DC conversion module (AC/DC module), and the type of the currently input AC input source is identified through the level condition sampled by the IO detection end, so as to ensure the charging efficiency.

As an optional embodiment, the intelligent charging method and device can automatically detect and identify the AC input source of the charger, and then automatically set the maximum power which can be output according to different input sources, so that the purpose of intelligent charging with maximum efficiency can be achieved under the condition of ensuring safety.

It will be appreciated from fig. 1 that the household AC input may be a household standard plug (socket) and the generator AC input may be a generator standard plug (socket). The control panel CPU is also provided with a power module (DC/DC module) which supplies direct current to the control panel through external input, and the control panel CPU is also provided with a first switch and a second switch which are unidirectional current devices, and the unidirectional current devices are arranged to prevent voltage backflow among the first switch and the second switch. Further, the first detection terminal IO1 and the second detection terminal IO2 respectively include an MOS transistor and a pull-up resistor (pull-down resistor), which are connected to the control CPU and can read the high and low levels; when direct current (provided by the AC/DC module) exists, the MOS tube is driven to be opened, the control board detects that the IO pin connected with the control board is in a high level, the circuit is electrified at the moment, and the circuit is input at the moment.

The first/second alternating current/direct current conversion module AC/DC module is used for converting alternating current (220V and above) of the alternating current household/generator into direct current for supplying power to the control panel, so that the control panel can sample and read high and low levels of the first detection end IO1 and the second detection end IO2, and then an input source is accurately judged according to the high and low levels.

One end of the charging module is connected to the three-terminal switch, the other end of the charging module is connected to the MOS tube switch of the control panel/mainboard, and then the MOS tube switch is controlled to charge the battery, if the power is not enough, a plurality of the charging modules can be connected in parallel, and therefore the charging power is improved. The control panel CPU is also provided with a power supply module which can be a DC/DC power supply and supplies direct current to the control panel through external input.

In some embodiments, for example, a power module, a first switch and a second switch are disposed on the control board, one end of the first switch is connected to the first ac/dc conversion module and the first detection terminal IO1, respectively, and the other end of the first switch is connected to the power module, one end of the second switch is connected to the second ac/dc conversion module and the second detection terminal IO2, respectively, and the other end of the second switch is connected to the power module; by the above arrangement, the voltage is prevented from flowing backward, and the first switch and the second switch may be MOS switches.

Wherein, IO1 is used for sampling household AC input detection signals, and IO2 is used for sampling generator AC input detection signals.

In some embodiments, the charging circuit further comprises a housing disposed outside the charging circuit, and the housing is provided with a fool-proof interface, which includes a generator port and a household power source interface. The shapes of the spoken household power interfaces of the generator are different, so that the charging power error caused by the plugging error of a user can be prevented, and the charging safety and effectiveness are ensured.

The input source can be accurately distinguished, the problem that the input source cannot be distinguished when the voltage of the input source is equal is solved, and the problem that the charging power cannot be automatically adjusted when the power of the input source is unequal is also solved. The input source comes from two fixed different interfaces, prevents slow-witted design, and one is the generator mouth, and one is domestic power source interface, because two interface plugs are different, and the plug of generator mouth is different with domestic plug standard, consequently can not appear two kinds of input source and insert the wrong condition. The charger includes two different sockets, and different sockets correspond different input, and which interface has the input, and that interface will produce a high IO level and give the control panel, and the mouth IO that does not connect the input just is the low level, and the CPU control panel has come into input according to this IO level condition discernment which interface, and then CPU controls the output of inside module of charging, realizes output automatically and adjusts.

In some embodiments, the household power supply further comprises a three-terminal switch, a first path of the three-terminal switch is connected with the household input interface and the first alternating current/direct current conversion module, a second path of the three-terminal switch is connected with the generator input interface and the charging module, and one end of a third path of the three-terminal switch is connected with a charger power supply and is used for being connected with a plug or a socket to be input. Wherein, the three-terminal switch can be a rocker switch, a ship-type switch, an air switch and the like.

Illustratively, switch closure is at the home AC power input in position I and at the generator AC input in position II, although it is possible to set position I as the generator AC input and position II as the home AC power input, as desired.

In some embodiments, the control board is further configured to identify that the current time is a home input result if the first detection terminal IO1 detects a first level and the second detection terminal IO2 detects a second level; when the first detection terminal IO2 detects a first level and the second detection terminal IO1 detects a second level, the generator input result is identified, where the first level is a high level or a low level, and the second level is a low level or a high level relative to the first level. For example, in the case that the first detection terminal IO1 detects a high level and the second detection terminal IO2 detects a low level, it is recognized that the current time is a home input result; in the case that the first detection terminal IO2 detects a high level and the second detection terminal IO1 detects a low level, it is recognized that this time is a generator input result.

The CPU can detect the input power in a normal state according to the states of the IO1 and the IO2, and detect a high level when there is an input, and a low level on the other side.

In practical application, the workflow may be as follows: when the charger is used, a user inserts a household power supply input or a generator input plug (socket) into a socket (head) corresponding to a foolproof charger, a household Alternating Current (AC) input and a generator AC input are selectively input into a charging module of the charger through a three-terminal switch, one path of AC is respectively output to respective AC/DC modules from terminals of the household and generator switches at the front end of the three-terminal switch, meanwhile, the two AC/DC modules supply power to a PCB control board of the charger after passing through a one-way current device, and high and low IO signals are input to a CPU for detection, when the household plug is input, the CPU can automatically detect that IO1 is at a high level and IO2 is at a low level; when the generator has an input, the CPU will detect IO2 as high and IO1 as low.

Wherein, the high level is indicated by 1, the low level is indicated by 0, and the detection conditions are shown in the following table 1:

TABLE 1

As can be seen from the above table, in some embodiments, the control board is further configured to control the battery to charge according to the household input result, automatically adjust the charger power, reduce the charger power to meet the household safety standard, and perform IO fault warning when the first detection terminal IO1 detects a high level and the second detection terminal IO2 also detects a high level, or the first detection terminal IO1 detects a low level and the second detection terminal IO2 also detects a low level.

As an optional embodiment, after the input source type is identified, the output power is controlled through software, and the applicability is improved. When the household input is carried out, the output power is controlled not to be larger than the household maximum power; when the power of the generator is determined, the output power is controlled not to be larger than the maximum power of the generator. The maximum power of the generator and the maximum power of the household can be written into a control board program in advance, or modified through external input, so that the maximum power of the generator and the maximum power of the household can be adjusted according to different conditions.

Illustratively, the control board controls a charging module to output a first charging power, wherein the first charging power is obtained based on the power input result. According to the signal of the input end, the CPU automatically determines the output power, and the purpose of protecting the input source is achieved. The CPU is communicated with the charging module, and the charging module can output current information such as voltage and current to the CPU so as to improve the accuracy of output power. The first charging power may be a maximum charging power, i.e., a generator charging power, or a household electric charging power, which is determined based on the power input result.

In some embodiments, the charging system further comprises a temperature sensing element connected to the control board, and the control board is configured to receive the current temperature of the battery sent by the temperature sensing element and control the charging module to output the second charging power. The second charging power may be the maximum charging power or the household electric charging power, and when the detected current temperature of the battery is too high, the second charging power is the household electric charging power, and when the detected current temperature of the battery is not higher than the preset value, the second charging power may be the maximum charging power, and of course, the maximum charging power is allowed to be adopted on the premise that the current temperature is determined to be the input end of the generator based on the input source detection.

CPU still passes through digital interface communication with the battery, according to the feedback data (including temperature data) of battery, transmits charger CPU through digital command's mode, and CPU sends the module that charges, adjusts output to adjust output, can make power output more accurate and can not be out of control, also can not make output oscillation appear simultaneously. The charging module can also be an AC/DC module, and converts external input electricity (household input or generator input) into direct current to supply power to the battery.

For example: when the CPU receives an IO1 signal of 1 and an IO2 signal of 0, the domestic power output is determined according to preset conditions, the CPU sends a charging current 10A instruction to the charging module, the charging module adjusts the output current to 10A, the battery is charged by 220V10A, and the charging power is prevented from being larger than the load power of the domestic power. Meanwhile, in the charging process, when the temperature of the battery received by the CPU reaches 70 ℃, the CPU determines that the charging current corresponding to the temperature is 5A according to preset conditions, the CPU sends the determined current value to the charging module, the charging module adjusts the output current to 5A, and the battery is charged by using 220V 5A; the CPU continuously receives the temperature of the battery, when the temperature reaches 45 ℃, the CPU determines that the charging current corresponding to the temperature is 10A according to preset conditions, the CPU sends the determined current value to the charging module, the charging module adjusts the output current to 10A, and the charger charges the battery by using 220V 10A.

The application provides a charging circuit, input signals are determined according to different input sources, after the input signals according to the different input sources are received, output power is automatically determined according to the input signals, and the purposes of protecting the input sources and improving charging power are achieved.

In some embodiments, there is also provided a charger including the charging circuit as described above, and further including a charger main body connected to the charging circuit.

This application is owing to use different input sources to take and prevent slow-witted design (generator AC input plug (seat) is special socket (head) of generator, and domestic standard plug (head) seat can't insert, and domestic AC input is domestic standard input plug (seat), can't insert generator socket (head)), can accomplish a key conversion through three terminal switch, easy operation, automatic identification and the different input power of automatic adaptation. Through hardware design, high and low levels are detected, whether input sources with the same voltage or input sources with different powers are household or generator input sources is distinguished, and operation is simple. In addition, the automatic detection of the AC source can be realized, different power consumptions can be limited according to different input sources, the problem caused by the fact that charging power is not matched with a power input end is avoided, and the purpose of protecting the input sources is achieved.

The embodiment of the utility model provides a charger, the charging circuit who provides with above-mentioned embodiment has the same technical characteristic, so also can solve the same technical problem, reaches the same technological effect.

In the description of the embodiments of the present invention, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the technical solution of the present invention, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: those skilled in the art can still modify or easily conceive of changes in the technical solutions described in the foregoing embodiments or make equivalent substitutions for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.

Claims

1. A charging circuit is characterized by comprising a household input interface, a generator input interface, a first alternating current-direct current conversion module, a second alternating current-direct current conversion module and a control board, wherein the control board comprises a first detection end IO1 and a second detection end IO 2;

2. The charging circuit of claim 1, wherein the control board is further configured to recognize that the input result is a household input result when the first detection terminal IO1 detects a first level and the second detection terminal IO2 detects a second level; when the first detection terminal IO2 detects a first level and the second detection terminal IO1 detects a second level, the generator input result is identified, wherein the first level is a high level or a low level, and the second level is a low level or a high level relative to the first level.

3. The charging circuit of claim 1, further comprising a charging module connected to the control board, wherein the control board is further configured to control the charging module to output a first charging power, wherein the first charging power is obtained based on the power input result, and the first charging power at least comprises a household electric charging power and a generator charging power.

4. The charging circuit of claim 3, further comprising a temperature sensing element connected to the control board, wherein the control board is configured to receive the current temperature of the battery sent by the temperature sensing element and adjust to output a second charging power, wherein the second charging power at least comprises a household electric charging power and a generator charging power.

5. The charging circuit of claim 4, wherein the charging module is further configured to charge a battery according to the first charging power or the second charging power.

6. The charging circuit according to claim 3 or 4, wherein the control board is provided with a power module, a first switch and a second switch, one end of the first switch is connected to the power module, the other end of the first switch is connected to the first ac/dc conversion module and the first detection terminal IO1, one end of the second switch is connected to the power module, and the other end of the second switch is connected to the second ac/dc conversion module and the second detection terminal IO 2.

7. The charging circuit of claim 2, wherein the control board is further configured to control the charging power according to the household input result if the first detection terminal IO1 detects a high level and the second detection terminal IO2 also detects a high level, or the first detection terminal IO1 detects a low level and the second detection terminal IO2 also detects a low level.

8. The charging circuit of claim 1, further comprising a housing disposed outside the charging circuit, wherein the housing is provided with a fool-proof interface, and the fool-proof interface comprises a generator port and a household power source interface.

9. The charging circuit according to claim 1, further comprising a three-terminal switch, wherein a first path of the three-terminal switch is connected to the household input interface and the first ac/dc conversion module, a second path of the three-terminal switch is connected to the generator input interface and the second ac/dc conversion module, and one end of a third path of the three-terminal switch is connected to the charging module.

10. A charger, characterized by comprising the charging circuit according to any one of claims 1 to 9, and further comprising a charger main body connected to the charging circuit.