CN213305027U - Battery charging detection multiplexing IO port circuit - Google Patents
Battery charging detection multiplexing IO port circuit Download PDFInfo
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- CN213305027U CN213305027U CN202022217581.8U CN202022217581U CN213305027U CN 213305027 U CN213305027 U CN 213305027U CN 202022217581 U CN202022217581 U CN 202022217581U CN 213305027 U CN213305027 U CN 213305027U
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Abstract
The utility model discloses a battery charging detects multiplexing IO mouth circuit. The multiplexing IO mouth circuit of battery charging detection includes: the charging detection module is used for detecting the charging state of the battery; the state indicating module is electrically connected with the charging detection module and used for outputting an electric signal according to the charging state; the first port of the main control module is electrically connected with the state indicating module and used for outputting a display signal according to the electric signal; wherein, the status indication module includes: the first state indication module is electrically connected with the second state indication module, and a first port of the main control module is electrically connected with a connecting node of the first state indication module and the second state indication module. According to the embodiment of the application, the detection and display of three charging states of the battery can be realized by utilizing one port of the main control module, the using number of the ports of the main control module is reduced, and therefore the cost of the battery charging detection multiplexing IO port circuit is reduced.
Description
Technical Field
The utility model relates to a charged state detection area especially relates to a multiplexing IO mouth circuit of battery charging detection.
Background
In the related art, two pins on a battery charging chip are used as indication pins of the battery charging state. However, the above-mentioned charging state indication method requires two I/O ports of the CPU to be connected to two pins of the charging chip, and usually, it is also necessary to detect whether there is an inserted charging power supply, and it is necessary to occupy three I/O port resources, which not only affects the use of the I/O ports of the CPU, but also increases the cost of the charging detection circuit.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a battery charging detects multiplexing IO mouthful circuit can reduce the use quantity of host system port to reduce the cost that battery charging detected multiplexing IO mouthful circuit.
According to the utility model discloses battery charging detects multiplexing IO mouth circuit, include: the charging detection module is used for charging the battery and detecting the charging state of the battery; the state indicating module is electrically connected with the charging detection module and used for outputting an electric signal according to the charging state; the first port of the main control module is electrically connected with the state indicating module and used for outputting a display signal according to the electric signal; wherein the status indication module comprises: the main control module comprises a first state indication module and a second state indication module, wherein the first state indication module is electrically connected with the second state indication module, and a first port of the main control module is electrically connected with a connection node of the first state indication module and the second state indication module.
According to the utility model discloses battery charging detects multiplexing IO mouth circuit has following beneficial effect at least: the first state indicating module and the second state indicating module are electrically connected, the first port of the main control module is electrically connected with the connecting node of the first state indicating module and the second state indicating module, detection and identification of three charging states (charging, full charging and non-charging) of the battery can be realized by utilizing one port of the main control module, the using number of the ports of the main control module is reduced, the utilization rate of the ports of the main control module is improved, and the cost of the battery charging detection multiplexing IO port circuit is reduced.
According to some embodiments of the present invention, further comprising: the power supply module is electrically connected with the first state indicating module and used for providing a power supply for the main control module; the charge detection module includes: a charge detection unit for charging the battery and detecting a charge state of the battery; the first status indication module comprises: one end of the first resistor is electrically connected with the power supply module, and the other end of the first resistor is electrically connected with the first port of the charging detection unit; the second status indication module comprises: one end of the second resistor is electrically connected with the other end of the first resistor, and the other end of the second resistor is electrically connected with the second port of the charging detection unit; the first port of the main control module is electrically connected with a connection node of the first resistor and the second resistor.
According to some embodiments of the present invention, further comprising: and the plug-in power supply module is electrically connected with the charging detection module and is used for providing a charging power supply.
According to the utility model discloses a some embodiments, the detection module that charges still includes: and one end of the third resistor is electrically connected with the plug-in power supply module, and the other end of the third resistor is electrically connected with a third port of the charging detection unit.
According to some embodiments of the present invention, the charging detection module further comprises: and the charging setting unit is electrically connected with the fourth port of the charging detection unit and is used for setting the charging current of the battery.
According to some embodiments of the present invention, the charging setting unit includes: and one end of the fourth resistor is electrically connected with the fourth port of the charging detection unit, and the other end of the fourth resistor is grounded.
According to the utility model discloses a some embodiments, the detection module that charges still includes: and one end of the first capacitor is electrically connected with the other end of the third resistor, and the other end of the first capacitor is grounded and is electrically connected with a fifth port of the charging detection unit.
According to some embodiments of the present invention, further comprising: the battery module is electrically connected with the sixth port of the charging detection unit; the charge detection module further includes: and one end of the second capacitor is electrically connected with the battery module, and the other end of the second capacitor is grounded.
According to the utility model discloses a some embodiments, the model of the detecting element that charges is following any kind: TP4056, ME4056, TP4057, ME 4057.
According to some embodiments of the invention, the first port of the master control module is an ad port.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The invention will be further described with reference to the following drawings and examples, in which:
fig. 1 is a block diagram of a specific embodiment of the battery charging detection multiplexing IO port circuit of the present invention;
fig. 2 is a block diagram of another embodiment of the battery charging detection multiplexing IO port circuit of the present invention;
fig. 3 is a schematic circuit diagram of a specific embodiment of the battery charging detection multiplexing IO port circuit of the present invention.
Description of reference numerals:
the system comprises a charging detection module 100, a charging detection unit 110, a status indication module 200, a first status indication module 210, a second status indication module 220, a main control module 300, a power supply module 400, a plug-in power supply module 500 and a battery module 600.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does 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.
In the description of the present invention, a plurality of means is one or more, a plurality of means is two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
It should be noted that the battery charging detection multiplexing IO port circuit provided by the present application is suitable for various electronic products powered by a lithium battery, and in the following embodiments, a battery is referred to as a lithium battery for short.
Referring to fig. 1, in some embodiments, a battery charge detection multiplexing IO port circuit includes: the charging detection module 100, the status indication module 200 and the main control module 300. The charging detection module 100 is used for charging the battery and detecting the charging state of the battery; the state indicating module 200 is electrically connected to the charging detecting module 100, and is configured to output an electrical signal according to a charging state; the first port of the main control module 300 is electrically connected to the status indication module 200, and the main control module 300 is configured to identify a charging status according to the electrical signal and output a corresponding display signal. Wherein, the status indication module 200 includes: a first status indication module 210 and a second status indication module 220. The first status indication module 210 is electrically connected to the second status indication module 220, and the first port of the main control module 300 is electrically connected to a connection node of the first status indication module 210 and the second status indication module 220. Specifically, the battery charging status includes three states of charging, full charging and non-charging, and therefore, the first status indication module 210 indicates the charging status, and the second status indication module 220 indicates the full charging status. The first status indication module 210 is electrically connected to the second status indication module 220, and the connection node is electrically connected to the first port of the main control module 300, so that the detection of three charging statuses of the battery can be realized by using one port of the main control module 300.
In some specific embodiments, the charging detection module 100 detects a charging state of the battery, the state indication module 200 outputs a corresponding charging electrical signal or a full-charging electrical signal according to the charging state, the first port of the main control module 300 receives the electrical signal and determines and identifies the charging state of the battery according to a value of the electrical signal, and the main control module 300 outputs a corresponding display signal according to a determination result to display any one of the following charging states of the battery: a state of charge, a state of full charge, or a state of no charge. It can be understood that the display signal may be used to control on/off of LED indicator lamps corresponding to different charging states, or control display of display screens such as an LCD, or control display of other charging state display modes, and the like, and the embodiments of the present application are not limited in particular.
The utility model provides a multiplexing IO mouth circuit of battery charging detection is through carrying out the electricity with first state indication module 210 and second state indication module 220 and be connected, and the first port that sets up host system 300 is connected with the connected node electricity of first state indication module 210 and second state indication module 220, can realize the detection and the discernment of two kinds of charged states of battery with a port that utilizes host system 300, reduce the use quantity of host system 300 port, thereby the utilization ratio of host system 300 port has been improved, and the cost of multiplexing IO mouth circuit of battery charging detection has been reduced.
Referring to fig. 2, in some embodiments, the battery charge detection multiplexing IO port circuit further includes: a power supply module 400. The power supply module 400 is electrically connected to the first status indication module 210 and is configured to provide a power supply for the main control module 300. The charge detection module 100 includes: a charge detection unit 110 for charging the battery and detecting a charged state of the battery. Referring to fig. 3, the first status indication module 210 includes: one end of the first resistor R1 and one end of the first resistor R1 are electrically connected to the power supply module 400, and the other end of the first resistor R1 is electrically connected to the first port of the charge detection unit 110. The second status indication module 220 includes a second resistor R2, wherein one end of the second resistor R2 is electrically connected to the other end of the first resistor R1, and the other end of the second resistor R2 is electrically connected to the second port of the charge detection unit 110. Specifically, the charging detection unit 110 is a charging chip IC1, and the power supply module 400 is used for providing a power supply VCC. The connection node of the first resistor R1 and the second resistor R2 is electrically connected to the first port of the main control module 300, the first port of the charging detection unit 110 is electrically connected to the first port of the main control module 300 and is connected to the power supply module 400 through the pull-up first resistor R1, and the second port of the charging detection unit 110 is connected to the first port of the main control module 300 through the pull-down second resistor R2.
Referring to fig. 3, in some specific embodiments, the first port of the charging detection unit 110 is a CHRG port, and the second port of the charging detection unit 110 is a stbby port. When the charging detection unit 110 detects that the battery is in a charging state, the first port of the charging detection unit 110 outputs a low level of 0V, the second port of the charging detection unit 110 is open-circuited at the drain, and at this time, the electrical signal received by the first port of the main control module 300 is 0V. When the charge detection unit 110 detects that the battery is in a fully charged state, the first port of the charge detection unit 110 is open-circuited at the drain, the second port of the charge detection unit 110 outputs a low level of 0V, and the electrical signal received by the first port of the main control module 300 is a voltage U1 divided by the power supply VCC through the pull-up first resistor R1 and the pull-down second resistor R2, that is, U1 is VCC × R2 ÷ (R1+ R2). Therefore, when the electrical signal received by the main control module 300 is at a low level of 0V, it is determined that the battery is in a charging state; when the electrical signal received by the main control module 300 is the divided voltage U1 of the power supply VCC, it is determined that the battery is in a fully charged state. The main control module 300 determines the received electrical signal and outputs a corresponding display signal to display the state of the battery during or full charge. It is understood that the determination of the electrical signal by the main control module 300 may have a certain error range, for example, an error range of 5%, and the embodiment of the present application is not particularly limited.
In some embodiments, the first resistor R1 and the second resistor R2 may have a resistance of 2K to 20K, and the ratio of the resistances of the first resistor R1 and the second resistor R2 is in a range of 1:1 to 1: 3.
In some embodiments, the battery charging detection multiplexing IO port circuit further includes: and the plug-in power supply module 500 is electrically connected with the charging detection module 100 and is used for providing a charging power supply. The charging detection module 100 further includes: one end of the third resistor R3, one end of the third resistor R3 are electrically connected to the plug-in power module 500, and the other end of the third resistor R3 are electrically connected to the third port of the charge detection unit 110. Specifically, the plug-in power module 500 is used for providing a charging power, that is, providing a power VIN to charge the battery. The third port of the charging detection unit 110 is a VCC port, and the third resistor R3 is a charging voltage-dividing protection resistor of the charging detection unit 110. When the power-on module 500 provides the charging power VIN, that is, when power is on, if the battery is in a charging state at this time, the first port of the main control module 300 receives a 0V electrical signal; if the battery is fully charged, the first port of the main control module 300 receives the divided voltage signal U1. When the plug-in power supply module 500 does not provide the charging power supply VIN, i.e. there is no plug-in power, the first port and the second port of the charging detection unit 110 are in an open-drain state, but due to the presence of the pull-up first resistor R1, the first port of the main control module 300 will detect a high-level electrical signal approximately equal to the power supply VCC. The main control module 300 determines the electrical signal received by the first port of the main control module 300 to obtain the charging input plug-in state and the charging state of the battery, which not only reduces the number of ports of the main control module 300, but also reduces the cost of the battery charging detection multiplexing IO port circuit.
In some embodiments, the charging source VIN is DC5V, and the charging source current should be not less than 1A.
In some embodiments, the charging detection module 100 further includes a charging setting unit 120, the charging setting unit 120 is electrically connected to the fourth port of the charging detection unit 110, and the charging setting unit 120 is configured to set a charging current of the battery. Specifically, the fourth port of the charge detection unit 110 is a PROG port. In some specific embodiments, the charge setting unit 120 includes: and a fourth resistor R4. One end of the fourth resistor R4 is electrically connected to the fourth port of the charge detection unit 110, and the other end of the fourth resistor R4 is grounded. The resistance value of the fourth resistor R4 is adjusted to set different charging currents of the battery, so that constant-current charging of the battery is realized.
In some embodiments, the charge detection module 100 further comprises: a first capacitor C1. One end of the first capacitor C1 is electrically connected to the other end of the third resistor R3, and the other end of the first capacitor C1 is grounded and electrically connected to the fifth port of the charge detection unit 110. Specifically, the fifth port of the charging detection unit 110 is a GND port, and the first capacitor C1 is an input capacitor of the charging detection unit 110, and is used for stabilizing the dc voltage of the charging power source VIN, so as to ensure stable operation of the subsequent circuit. It is understood that the first capacitor C1 can be selected to have a capacity in the range of 1 μ F to 10 μ F and withstand voltage above 16V.
In some embodiments, the battery charging detection multiplexing IO port circuit further includes: and a battery module 600, wherein the battery module 600 is electrically connected with the sixth port of the charging detection unit 110. The charging detection module 100 further includes: and one end of a second capacitor C2, a second capacitor C2 and the battery module 600 are electrically connected, and the other end of the second capacitor C2 is grounded. Specifically, the battery module 600 includes a single 3.7V lithium battery. The sixth port of the charge detection unit 110 is a BAT port, and the charging power source VIN charges the battery through the sixth port of the charge detection unit 110. The second capacitor C2 is an output capacitor of the charge detection unit 110, and is used for reducing electromagnetic interference in the circuit. It is understood that the second capacitor C2 can be selected to have a capacity in the range of 1 μ F to 10 μ F and withstand voltage above 16V. The number of cells in the battery module 600 may be adaptively selected according to the actual situation.
In some embodiments, the model of the charge detection unit 110 is any one of: TP4056, ME4056, TP4057, ME 4057. Specifically, when the device is selected, the charging detection unit 110 needs to select a lithium battery charging chip with an indication pin having two charging states of "charging in progress" and "full charge", a function of adjusting charging current, a function of preventing reverse flow and over-temperature protection, and a function of controlling constant current and constant voltage line performance. For example, a TP4056 chip packaged with SOP8 and having a bottom heat sink, an ME4056 chip (maximum charging current of 1A), an ME4057 chip (maximum charging current of 1A and having a lithium battery reverse connection protection function), or a TP4056 chip packaged with SOT23-6 (maximum charging current of 0.6A), etc. The specific model of the charging detection unit 110 can be adaptively selected according to the battery capacity, the charging current requirement of the electronic product, and the size limit of the PCBA. Because the charging detection unit 110 is a linear control chip, when the battery voltage is low, the charging detection unit 110 may form a high voltage difference between input and output, and the voltage difference will increase the heat generation of the charging detection unit 110, so that a sufficient area of heat dissipation copper sheet needs to be reserved on the PCB of the battery charging detection multiplexing IO port circuit to prevent the charging detection unit 110 from entering over-temperature protection due to overheating and causing the charging current to automatically decrease, thereby affecting the charging time of the battery. The third resistor R3 should be a 1206 chip resistor of 0.22 Ω to 0.4 Ω, so as to reduce on-chip power consumption caused by high voltage difference between input and output of the charging detection unit 110 when the battery voltage is too low, and reduce temperature rise of the charging detection unit 110.
In some embodiments, the first port of the host module 300 is an A/D port. Therefore, when the device type selection is performed on the main control module 300, only the a/D port is required to be provided.
In a specific embodiment, when the battery charging detection module 100 detects that there is no charging power VIN, i.e. no power is plugged, the a/D port of the main control module 300 receives a high level signal. When the battery charging detection module 100 detects that the charging power source VIN is present, that is, when the battery is plugged, if the battery is in a charging state, the a/D port of the main control module 300 receives a 0V low level signal; if the battery is in a fully charged state, the a/D port of the main control module 300 receives a voltage U1 divided by the power supply VCC through the third resistor R3 and the fourth resistor R4.
The battery charging detection multiplexing IO port circuit provided by the embodiment of the application can realize detection and identification of the battery plugging state and the charging state through one A/D port of the main control module 300, reduces the using quantity of the ports of the main control module 300, thereby improving the utilization rate of the ports of the main control module 300 and reducing the cost of the battery charging detection multiplexing IO port circuit.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. Furthermore, the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.
Claims (10)
1. Multiplexing IO mouth circuit of battery charging detection, its characterized in that includes:
the charging detection module is used for charging a battery and detecting the charging state of the battery;
the state indicating module is electrically connected with the charging detection module and used for outputting an electric signal according to the charging state;
the first port of the main control module is electrically connected with the state indicating module and used for outputting a display signal according to the electric signal;
wherein the status indication module comprises: the main control module comprises a first state indication module and a second state indication module, wherein the first state indication module is electrically connected with the second state indication module, and a first port of the main control module is electrically connected with a connection node of the first state indication module and the second state indication module.
2. The battery charging detection multiplexing IO port circuit of claim 1, further comprising:
the power supply module is electrically connected with the first state indicating module and used for providing a power supply for the main control module;
the charge detection module includes: a charge detection unit for charging the battery and detecting a charge state of the battery;
the first status indication module comprises: one end of the first resistor is electrically connected with the power supply module, and the other end of the first resistor is electrically connected with the first port of the charging detection unit;
the second status indication module comprises: one end of the second resistor is electrically connected with the other end of the first resistor, and the other end of the second resistor is electrically connected with the second port of the charging detection unit;
the first port of the main control module is electrically connected with a connection node of the first resistor and the second resistor.
3. The battery charging detection multiplexing IO port circuit of claim 2, further comprising:
and the plug-in power supply module is electrically connected with the charging detection module and is used for providing a charging power supply.
4. The battery charging detection multiplexing IO port circuit of claim 3, wherein the charging detection module further comprises:
and one end of the third resistor is electrically connected with the plug-in power supply module, and the other end of the third resistor is electrically connected with a third port of the charging detection unit.
5. The battery charging detection multiplexing IO port circuit of claim 4, wherein the charging detection module further comprises:
and the charging setting unit is electrically connected with the fourth port of the charging detection unit and is used for setting the charging current of the battery.
6. The battery charging detection multiplexing IO port circuit of claim 5, wherein the charging setting unit includes:
and one end of the fourth resistor is electrically connected with the fourth port of the charging detection unit, and the other end of the fourth resistor is grounded.
7. The battery charging detection multiplexing IO port circuit of claim 6, wherein the charging detection module further comprises:
and one end of the first capacitor is electrically connected with the other end of the third resistor, and the other end of the first capacitor is grounded and is electrically connected with a fifth port of the charging detection unit.
8. The battery charging detection multiplexing IO port circuit according to any one of claims 2 to 7, further comprising:
the battery module is electrically connected with the sixth port of the charging detection unit;
the charge detection module further includes: and one end of the second capacitor is electrically connected with the battery module, and the other end of the second capacitor is grounded.
9. The battery charging detection multiplexing IO port circuit of claim 8, wherein the type of the charging detection unit is any one of: TP4056, ME4056, TP4057, ME 4057.
10. The battery charging detection multiplexing IO port circuit of claim 9, wherein the first port of the master control module is an a/D port.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022217581.8U CN213305027U (en) | 2020-09-30 | 2020-09-30 | Battery charging detection multiplexing IO port circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022217581.8U CN213305027U (en) | 2020-09-30 | 2020-09-30 | Battery charging detection multiplexing IO port circuit |
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| CN213305027U true CN213305027U (en) | 2021-05-28 |
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| CN202022217581.8U Active CN213305027U (en) | 2020-09-30 | 2020-09-30 | Battery charging detection multiplexing IO port circuit |
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