CN216121899U - Hardware self-adaption double-battery switching circuit based on handheld terminal - Google Patents
Hardware self-adaption double-battery switching circuit based on handheld terminal Download PDFInfo
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- CN216121899U CN216121899U CN202122705719.3U CN202122705719U CN216121899U CN 216121899 U CN216121899 U CN 216121899U CN 202122705719 U CN202122705719 U CN 202122705719U CN 216121899 U CN216121899 U CN 216121899U
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Abstract
The utility model relates to a hardware self-adapting double-battery switching circuit based on a handheld terminal, which comprises: the main battery is electrically connected with the system of the handheld terminal through a first control switch; a first voltage detection chip connected to the main battery; the NOT gate is connected with the first voltage detection chip and is in control connection with the first control switch; the auxiliary battery is electrically connected with the handheld system through a second control switch; a second voltage detection chip connected to the sub-battery; and the OR gate is connected with the second voltage detection chip and the first voltage detection chip and is in control connection with the second control switch. According to the utility model, when the electric quantity of the main battery is lower, the auxiliary battery is switched to supply power for the system of the handheld terminal, so that the system can not be immediately shut down, and the problem of information loss caused by the fact that the battery is dead can be avoided to a great extent.
Description
Technical Field
The utility model relates to the technical field of battery power supply circuits, in particular to a hardware self-adaptive double-battery switching circuit based on a handheld terminal.
Background
The handheld scanning terminal is widely applied to various industries and brings great convenience to daily work and life. However, the handheld scanning terminal generally needs to be operated for a long time, and if the battery is not charged during the use process, the information is easily lost, thereby bringing great inconvenience to the user.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art, provides a hardware self-adaptive double-battery switching circuit based on a handheld terminal, and solves the problem that the comprehensive functions of the conventional handheld terminal are easy to cause information loss due to battery shortage in the using process, so that great inconvenience is brought to a user.
The technical scheme for realizing the purpose is as follows:
the utility model provides a hardware self-adaptive double-battery switching circuit based on a handheld terminal, which comprises:
the main battery is electrically connected with the system of the handheld terminal through a first control switch;
a first voltage detection chip connected to the main battery;
the NOT gate is connected with the first voltage detection chip and is in control connection with the first control switch;
the auxiliary battery is electrically connected with the handheld system through a second control switch;
a second voltage detection chip connected to the sub-battery; and
and the OR gate is connected with the second voltage detection chip and the first voltage detection chip and is in control connection with the second control switch.
The double-battery switching circuit provides two batteries for the handheld terminal to supply power, the main battery supplies power for the system of the handheld terminal during normal use, the auxiliary battery supplies power for the system of the handheld terminal when the electric quantity of the main battery is lower, the system switching battery can be guaranteed to supply power when the electric quantity is lower, the switching process is completely realized by hardware, the system cannot be immediately shut down, and the problem of information loss caused by the fact that the battery is dead can be avoided to a great extent.
The hardware self-adaptive double-battery switching circuit based on the handheld terminal is further improved in that the first control switch and the second control switch are MOS tubes.
The hardware self-adaptive double-battery switching circuit based on the handheld terminal is further improved in that an inverting module is connected between the second voltage detection chip and the OR gate.
The hardware self-adaptive double-battery switching circuit based on the handheld terminal is further improved in that the phase reversal module is an NMOS tube.
The hardware self-adaptive double-battery switching circuit based on the handheld terminal is further improved in that a first resistor is connected in series between the output end of the first voltage detection chip and the connecting end of the NOT gate.
The hardware self-adaptive double-battery switching circuit based on the handheld terminal is further improved in that the first voltage detection chip and the second voltage detection chip are comparators.
The hardware self-adaptive double-battery switching circuit based on the handheld terminal is further improved in that the capacity of the main battery is larger than that of the auxiliary battery.
The hardware self-adaptive double-battery switching circuit based on the handheld terminal is further improved in that a second resistor is connected between the second control switch and the output end of the OR gate.
The hardware self-adaptive double-battery switching circuit based on the handheld terminal is further improved in that a third resistor is connected between the output end of the NOT gate and the first control switch.
Drawings
Fig. 1 is a schematic diagram of a hardware self-adaptive dual battery switching circuit based on a handheld terminal according to the present invention.
Fig. 2 is a circuit diagram of the hardware self-adaptive dual battery switching circuit based on the handheld terminal at the or gate.
Fig. 3 is an enlarged schematic view of the left-hand portion of fig. 2.
Fig. 4 is an enlarged schematic view of a portion of the right side of fig. 2.
Fig. 5 is a circuit diagram of the not gate of the hardware self-adaptive dual-battery switching circuit based on the handheld terminal.
Detailed Description
The utility model is further described with reference to the following figures and specific examples.
Referring to fig. 1, the utility model provides a hardware self-adaptive dual-battery switching circuit based on a handheld terminal, which is used for solving the problem that information is easily lost due to the fact that a battery is dead in the use process of the existing handheld terminal. The double-battery switching circuit automatically switches to the auxiliary battery for power supply through the design of hardware when the electric quantity of the main battery is low, so that the system cannot be immediately shut down, and the problem of information loss is avoided. The hardware self-adaptive dual battery switching circuit based on the handheld terminal of the present invention is described with reference to the accompanying drawings.
Referring to fig. 1, a schematic diagram of the hardware self-adaptive dual battery switching circuit based on the handheld terminal of the present invention is shown. The hardware self-adaptive dual battery switching circuit based on the handheld terminal of the present invention is described with reference to fig. 1.
As shown in fig. 1, the hardware self-adaptive dual battery switching circuit based on the handheld terminal of the present invention includes a main battery 21, a sub-battery 25, a first voltage detection chip 22, a second voltage detection chip 26, a not gate 23, an or gate 27, a first control switch 24 and a second control switch 28, wherein the main battery 21 is electrically connected to the system 10 of the handheld terminal through the first control switch 24, so as to form a power supply circuit controlled by the first control switch 24; the first voltage detection chip 22 is connected to the main battery 21 and configured to detect a voltage of the main battery 21, further, the not gate 23 is connected to the first voltage detection chip 22, the not gate 23 is also connected to the first control switch 24, and the opening and closing of the first control switch 24 are controlled by a signal output from the not gate 23, so as to control whether the main battery 21 is electrically connected to the system 10, that is, control of power supply to the main battery 21 is achieved. The sub-battery 25 is electrically connected to the system 10 of the hand-held terminal through a second control switch 28, and forms a power supply circuit controlled by the second control switch 28; the second voltage detection chip 22 is connected to the sub-battery 25 for detecting the voltage of the sub-battery 25, further, the or gate 27 is connected to the second voltage detection chip 26 and the first voltage detection chip 22, the or gate 27 is connected to the second control switch 28 in a control manner, and the opening and closing of the second control switch 28 is controlled by a signal output from the or gate 27, so as to control whether the sub-battery 25 is electrically connected to the system 10, that is, to control the power supply of the sub-battery 25.
Specifically, the first voltage detection chip 22 is configured to detect a voltage of the main battery 21, when the voltage of the main battery 21 is higher than a first setting value, an output signal of the first voltage detection chip 22 is a high level, the not gate 23 outputs a low level after receiving the high level, and the first control switch 24 is automatically closed after receiving the low level, so that the main battery 21 is electrically connected to the system 10, and the main battery 21 supplies power to the system 10. The first control switch 24 is a low conducting switch, i.e. conducting at low level. When the voltage of the main battery 21 is lower than the first set value, the output signal of the first voltage detection chip 22 is at a low level, the not gate 23 outputs a high level after receiving the low level, the first control switch 24 automatically disconnects after receiving the high level, and the main battery 21 is disconnected from the system 10, so that the system 10 is not powered by the main battery 21. Preferably, the full-charge voltage of the main battery 21 is 4.2V, and the first set value is 3V, that is, the power supply circuit of the main battery is cut off when the voltage of the main battery 21 is lower than 3V.
In the present embodiment, when the voltage of the sub-battery 25 is higher than the second set value, the output signal of the second voltage detecting chip 26 is at a low level, the or gate 27 receives the output signals of the second voltage detecting chip 26 and the first voltage detecting chip 22, when both the output signals are at a low level, the or gate 27 outputs a low level, and the second control switch 24 is automatically closed after receiving the low level, so that the sub-battery 25 supplies power to the system 10, that is, after the power supply of the main battery is cut off, the sub-battery 25 supplies power to the system 10. When the voltage of the sub-battery 25 is lower than the second set value, the output signal of the second voltage detection chip 26 is at a high level, the or gate 27 receives one high level or both high levels output the high level, and the second control switch 28 is automatically turned off after receiving the high level, so that the sub-battery 25 is not electrically connected with the system 10. Preferably, the second set value is 3V.
In another embodiment, to facilitate the design of the components, the second voltage detecting chip 26 has the same structure as the first voltage detecting chip 22, that is, the second voltage detecting chip 26 outputs a high level when detecting that the voltage of the sub-battery 25 is higher than a second set value, and outputs a low level when detecting that the voltage is lower than the second set value. At this time, a reverse module 29 is connected between the second voltage detecting chip 26 and the or gate 27, and the signal output by the second voltage detecting chip 26 is reversed by the reverse module 29, that is, when the second voltage detecting chip 26 outputs a high level, the signal passes through the reverse module 29 and becomes a low level, and when the second voltage detecting chip 26 outputs a low level, the signal passes through the reverse module 29 and becomes a high level. Preferably, the inversion module 29 is an NMOS transistor.
In one embodiment of the present invention, the first control switch 24 and the second control switch 28 are both MOS transistors.
In one embodiment of the present invention, the first voltage detecting chip 22 and the second voltage detecting chip 26 are both comparators.
In one embodiment of the present invention, the capacity of the main battery 22 is greater than the capacity of the sub-battery 25. Preferably, the capacity of the main battery 22 is 5000mAh, and the capacity of the sub-battery 25 is 70 mAh.
In one embodiment of the present invention, as shown in fig. 2 and 3, the first voltage detecting chip and the second voltage detecting chip are both gates, the first voltage detecting chip 22 is U3914, the second voltage detecting chip 26 is U3937, specifically, the VSS terminal of U3914 is grounded, the VDD terminal is connected to the main battery, a resistor R3961 is connected between the VDD terminal and the main battery in series, a resistor R3962 and a capacitor C3967 are connected between the resistor R3961 and the VDD terminal, the other ends of the resistor R3962 and the capacitor C3967 are both grounded, and the OUT terminal of U3914 is connected to an or gate and a not gate, respectively. The VSS end of the U3937 is grounded, the VDD end is connected with the auxiliary battery, a resistor R3901 is connected between the VDD end and the auxiliary battery in series, a resistor R3903, a capacitor C391 and a capacitor C3921 are connected between the resistor R3901 and the VDD end, the other ends of the resistor R3903, the capacitor C391 and the capacitor C3921 are grounded, and the OUT end of the U3937 is connected with the inverter module 29.
The inverting module 29 is a Q4321, the G terminal of the Q4321 is connected to the OUT terminal of U3937, the S terminal is grounded, and the D terminal is connected to the OR gate 27.
Referring to fig. 4, the or gate 27 is U3921, the terminal B of U3921 is connected to the terminal D of Q4321, and a resistor R3904 is connected between the terminal B of U3921 and the terminal D of the sub-battery in series, wherein the resistance of the resistor R3904 is 100K Ω. The terminal a of U3921 is connected to the terminal OUT of U3914, the VCC terminal and the terminal Y of U3921 are both connected to the second control switch 28, and specifically, the second resistor R3935 is connected to the VCC terminals of the second control switch 28 and U3921. The second resistor R3935 has a resistance of 100K Ω.
As shown in fig. 5, the not gate 23 is U3936, the a terminal of U3936 is connected to the OUT terminal of U3914, a first resistor R3910 is connected in series between the a terminal of U3936 and the OUT terminal of U3914, a capacitor C3937 is further connected to the a terminal of U3936 and the OUT terminal of U3914, and the other terminal of the capacitor C3937 is grounded. The Y of the U3936 is connected to the G terminal of the first control switch 24, and a third resistor R3946 is connected in series between the two, and the resistance of the third resistor R3946 is 1000 Ω. A capacitor C3952 is connected in series between the terminal G of the first control switch 24 and the third resistor R3946, and the other terminal of the capacitor C3952 is grounded. The VCC terminal of U3936 is connected to the S1 and S2 terminals of the first control switch 24.
When the device is used, the U3914 and the U3937 respectively detect the voltages of the main battery and the auxiliary battery, when the voltage of the main battery is higher than 3V, the output of the U3914 is high, the output of the U3936 is low, and at the moment, the output of the U3921 is high regardless of the voltage of the auxiliary battery, the U3925 is cut off, the U3938 is turned on, and the main battery supplies power for a system. When the voltage of the main battery is lower than 3V, the voltage height of the auxiliary battery is 3V, the output of U3914 is low, the output of U3937 is high, Q4321 is conducted, the output of U3921 is low, U3925 is conducted, U3938 is cut off, and the auxiliary battery supplies power for the system.
The utility model realizes the switching of system power supply in a hardware mode, avoids the automatic shutdown of the system caused by the overuse of the main battery, further causes data loss, switches to the auxiliary battery as the system function, and can avoid the automatic shutdown of the system caused by the dead battery. Further, for protecting the data safety of the system, when the hardware is switched to the auxiliary battery to supply power to the system, the system can enter a sleep or power-saving mode in a software control mode, and a user can be reminded of charging in time.
While the present invention has been described in detail and with reference to the embodiments thereof as illustrated in the accompanying drawings, it will be apparent to one skilled in the art that various changes and modifications can be made therein. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the scope of the utility model is to be determined by the appended claims.
Claims (9)
1. A hardware self-adaptive double-battery switching circuit based on a handheld terminal is characterized by comprising:
the main battery is electrically connected with the system of the handheld terminal through a first control switch;
a first voltage detection chip connected to the main battery;
the NOT gate is connected with the first voltage detection chip and is in control connection with the first control switch;
the auxiliary battery is electrically connected with the handheld system through a second control switch;
a second voltage detection chip connected to the sub-battery; and
and the OR gate is connected with the second voltage detection chip and the first voltage detection chip and is in control connection with the second control switch.
2. The handheld terminal based hardware self-adapting dual-battery switching circuit as claimed in claim 1, wherein the first control switch and the second control switch are MOS transistors.
3. The hand-held terminal-based hardware self-adaptive dual-battery switching circuit as claimed in claim 1, wherein an inverting module is connected between the second voltage detecting chip and the or gate.
4. The hand-held terminal-based hardware self-adaptive dual-battery switching circuit as claimed in claim 3, wherein the inverting module is an NMOS transistor.
5. The hardware self-adaptive dual-battery switching circuit based on the handheld terminal as claimed in claim 1, wherein a first resistor is connected in series between the output terminal of the first voltage detection chip and the connection terminal of the not gate.
6. The handheld terminal based hardware self-adapting dual battery switching circuit as defined in claim 1, wherein the first voltage detection chip and the second voltage detection chip are comparators.
7. The hardware self-adapting dual-battery switching circuit based on the handheld terminal as claimed in claim 1, wherein the capacity of the main battery is larger than the capacity of the sub-battery.
8. The hand-held terminal-based hardware self-adaptive dual-battery switching circuit as claimed in claim 1, wherein a second resistor is connected between the second control switch and the output terminal of the or gate.
9. The hand-held terminal-based hardware self-adaptive dual-battery switching circuit as claimed in claim 1, wherein a third resistor is connected between the output terminal of the not gate and the first control switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122705719.3U CN216121899U (en) | 2021-11-05 | 2021-11-05 | Hardware self-adaption double-battery switching circuit based on handheld terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122705719.3U CN216121899U (en) | 2021-11-05 | 2021-11-05 | Hardware self-adaption double-battery switching circuit based on handheld terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216121899U true CN216121899U (en) | 2022-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122705719.3U Active CN216121899U (en) | 2021-11-05 | 2021-11-05 | Hardware self-adaption double-battery switching circuit based on handheld terminal |
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| Country | Link |
|---|---|
| CN (1) | CN216121899U (en) |
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2021
- 2021-11-05 CN CN202122705719.3U patent/CN216121899U/en active Active
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