CN209730867U - A kind of anti-battery over-discharge road - Google Patents

A kind of anti-battery over-discharge road Download PDF

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Publication number
CN209730867U
CN209730867U CN201920760437.3U CN201920760437U CN209730867U CN 209730867 U CN209730867 U CN 209730867U CN 201920760437 U CN201920760437 U CN 201920760437U CN 209730867 U CN209730867 U CN 209730867U
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Prior art keywords
control circuit
battery
output end
load
battery over
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CN201920760437.3U
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刘英杰
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Weifang Goertek Electronics Co Ltd
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Weifang Goertek Electronics Co Ltd
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Abstract

The utility model relates to a kind of anti-battery over-discharge roads, for electronic product, electronic product includes load control circuit and the battery for load control circuit power supply, anti- battery over-discharge road includes: ON-OFF control circuit, its power input Vin1 is connected with the external power supply feeder ear Vin of the electronic product, and enabled control terminal EN1 is connected with the signal output end Vout1 of the load control circuit;Load switching switch, and feeder ear Vin2 is connected with the battery, enable end EN2 is connected with the output end vo ut2 of the ON-OFF control circuit, and output end vo ut3 is connected with the feeder ear Vin3 of the load control circuit;According to the level of the enabled control terminal EN1 of the ON-OFF control circuit, the signal of ON-OFF control circuit output controls being turned on or off for the load switching switch.The utility model is for solving the problems, such as battery over-discharge during transportation in existing small-sized electronic product.

Description

A kind of anti-battery over-discharge road
Technical field
The utility model relates to use for electronic products battery technical field of transportation, and in particular to a kind of anti-battery over-discharge road.
Background technique
Wearable device (such as Intelligent bracelet, wireless headset etc.) on the market is due to its miniaturization, portability, fashion at present The features such as property, is increasingly welcomed by the general public.Due to its miniaturization, such as wireless headset, its pcb board is set That counts is the smaller the better, and the pcb board size of wireless headset is smaller compared to the pcb board of common bluetooth headset, and on pcb board all Charging chip can be carried, the charge and discharge which manages earphone is electrically operated, when to charging chip type selecting, the encapsulation of selection Size is also the smaller the better, however the charging chip of some small package sizes does not have ship mode(Transportation Model, refers to production Product during transportation, make product enter low power consumpting state).And charging chip does not have the ship mode once, then product is being transported During defeated, battery is connected with load circuit always, leads to battery drain, if it is desired to allowing product guarantee to have enough circuits, just Load circuit works can only be allowed in suspend mode or low-power consumption mode, even if battery in this way is also the moment in electric discharge, therefore, still The case where so not can avoid battery drain, leading to battery capacity is zero, and long-time dead battery can damage the service life of battery, And when product reaches in user hand, it not can guarantee user's test product at once, reduce user experience.
Utility model content
The utility model provides a kind of anti-battery over-discharge road, for solving in existing small-sized electronic product in transportational process The problem of middle battery over-discharge.
In order to solve the above-mentioned technical problem, the utility model proposes following technical solutions to be resolved:
A kind of anti-battery over-discharge road, is used for electronic product, and the electronic product includes load control circuit and is described The battery of load control circuit power supply, which is characterized in that the anti-battery over-discharge road includes: ON-OFF control circuit, power supply Input terminal Vin1 is connected with the external power supply feeder ear Vin of the electronic product, enables control terminal EN1 and load control electricity The signal output end Vout1 on road is connected;Load switching switch, and feeder ear Vin2 is connected with the battery, enable end EN2 and institute The output end vo ut2 for stating ON-OFF control circuit is connected, the feeder ear Vin3 phase of output end vo ut3 and the load control circuit Even;According to the level of the enabled control terminal EN1 of the ON-OFF control circuit, the signal of the ON-OFF control circuit output controls institute State being turned on or off for load switching switch.
Anti- battery over-discharge road as described above, the ON-OFF control circuit includes: bleeder circuit, power input Vin4 is connected with the power input Vin1 of the ON-OFF control circuit, and output end vo ut4 makes with the ON-OFF control circuit It can control end EN1 to be connected;The switch element of low level conducting, enabled control terminal EN3 be connected to the enabled control terminal EN1 and Between the output end vo ut4 of the bleeder circuit, input terminal Vin5 is connected by pull-up resistor with the power input Vin1; Wherein the enable end EN2 of the load switching switch is connected to input terminal Vin5 and the institute of the switch element of the low level conducting It states between pull-up resistor;When the enabled control terminal EN1 of the ON-OFF control circuit exports low level, the load switching is controlled When switching and disconnect, and exporting high level, controls the load and switch switch conduction.
The switch element on anti-battery over-discharge road as described above, the low level conducting is PMOS tube, the PMOS tube Grid G be connected between the enabled control terminal EN1 of the ON-OFF control circuit and the output end vo ut4 of the bleeder circuit, Drain D is connected between the pull-up resistor and the enable end EN2 of the load switching switch, and source electrode is with meeting S.
Anti- battery over-discharge road as described above, the anti-battery over-discharge road further include: diode D1, anode and institute It states signal output end Vout1 to be connected, cathode is connected to the output end vo ut4 of the bleeder circuit and the grid G of the PMOS tube Between.
Anti- battery over-discharge road as described above, the anti-battery over-discharge road further include: diode D2, anode and institute It states external power supply feeder ear Vin to be connected, cathode is connected between the cathode of the diode D1 and the grid G of the PMOS tube.
Anti- battery over-discharge road as described above, the external power supply feeder ear Vin are the USB port of the electronic product Power output end.
Compared with prior art, the advantages of the anti-battery over-discharge road of the utility model and beneficial effect is: being produced in electronics In product transportational process, the Signal-controlled switch control circuit of the signal output end Vout1 output of load control circuit exports low electricity Flat, so that load switching switch disconnects, battery cannot be that load control circuit is powered by load switching switch, in external power supply When feeder ear Vin powers, ON-OFF control circuit exports high level, so that load switching switch conduction, battery pass through load switching Switch is that load control circuit is powered, and realizes the activation of electronic product, when removing external power supply feeder ear V, load control electricity The Signal-controlled switch control circuit of the signal output end Vout1 output on road still exports high level, makes load switching switch conduction, It is that load control circuit is powered that battery, which continues through load switching switch, and realizing reduces the power consumption of electronic product during transportation Amount, avoids battery over-discharge, effective protection battery.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be practical to this New embodiment or attached drawing needed to be used in the description of the prior art are made one and are briefly introduced, it should be apparent that, it is described below Attached drawing is some embodiments of the utility model, for those of ordinary skill in the art, is not being made the creative labor Under the premise of, it can also be obtained according to these attached drawings other accompanying drawings.
Fig. 1 is the structure that the anti-battery over-discharge road one embodiment of the utility model is connected with battery and load control circuit Block diagram;
Fig. 2 is the structural frames that the anti-battery over-discharge road embodiment of the utility model is connected with battery and load control circuit Figure;
Fig. 3 be Fig. 2 shows anti-battery over-discharge road embodiment circuit diagram;
Fig. 4 be Fig. 2 shows the anti-another embodiment in battery over-discharge road circuit diagram.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to The range of the utility model protection.
In order to avoid electronic product (such as bluetooth headset) during transportation battery over-discharge and when leading to battery life Between it is short, and guarantee electronic product reach user hand in when, can directly use battery.
Embodiment one
Referring to Figure 1, the present embodiment is related to a kind of anti-battery over-discharge road, is used for electronic product, setting in electronic product The battery (being denoted as Vbat) 2 for having load control circuit 1 and powering for load control circuit 1, the anti-battery over-discharge road include opening Close control circuit 3 and load switching switch 4, the power input Vin1 of ON-OFF control circuit 3 and the external power supply of electronic product Feeder ear Vin is connected, and is provided with USB port on the present embodiment electronic product, so the external power supply feeder ear Vin is USB port Power output end;The enabled control terminal EN1 of ON-OFF control circuit 3 is connected with the signal output end Vout1 of load control circuit 1; The feeder ear Vin2 of load switching switch 4 is connected with battery 2, the output end vo ut2 phase of enable end EN2 and ON-OFF control circuit 3 Even, output end vo ut3 is connected with the feeder ear Vin3 of load control circuit 4.
In the present embodiment, when the USB port of electronic product is not connected with external power supply, external power supply feeder ear Vin is that do not have Electricity, and when the enable end EN2 of load switching switch 4 is high level, load switching switch 4 is connected, at this time could be by battery 2 Load control circuit 1 is supplied by load switching switch 4, and when the enable end EN2 of load switching switch 4 is low level, it bears It carries switching switch 4 to disconnect, battery 2 cannot power at this time for load control circuit 1.The enable end EN2 of load switching switch 4 is controlled In the output Vout2 of ON-OFF control circuit 3, and the enable end EN1 of ON-OFF control circuit 3 is controlled by load control circuit 1 Signal output end Vout1.
Embodiment two
Referring to FIG. 2, in the present embodiment, 3 tunnels of switch control electricity include the switch of bleeder circuit 31 and low level conducting Element 32, the power input Vin4 of bleeder circuit 31 are connected with the power input Vin1 of ON-OFF control circuit, i.e. and Vin= Vin1=Vin4, output end vo ut4 are connected with the enabled control terminal EN1 of ON-OFF control circuit;The switch element 32 of low level conducting Enabled control terminal EN3 be connected between enabled control terminal EN1 and output end vo ut4, input terminal Vin5 pass through pull-up resistor R1 It is connected with power input Vin1;The enable end EN2 of load switching switch 4 is connected to the defeated of the switch element 32 of low level conducting Enter to hold between Vin5 and pull-up resistor R1;When the enabled control terminal EN1 of ON-OFF control circuit 3 exports low level, low level is led Logical switch element 31 is connected, and the enable end EN2 of load switching switch 4 is low level, disconnects load switching switch 4, and makes When can control end EN1 output high level, the switch element 31 of low level conducting is disconnected, and load switching switch 4 is connected, to realize Power supply of the battery 2 to load control circuit 1.
Specifically, referring to FIG. 3, the present embodiment load switching switch 4 is a switch chip U1, low level in the present embodiment The switch element of conducting is PMOS tube Q1, and bleeder circuit is that resistance R2 and R3 connect the circuit to be formed, wherein one end of R2 and outer Portion power supply side Vin is connected, and the letter of one end of the other end and R3, the grid G of PMOS tube and load switch control circuit 1 Number output end vo ut1 is connected, R3 other end ground connection, the drain D of PMOS tube Q1 by pull-up resistor R1 be connected to one end of R2 with Between external power supply feeder ear Vin, source S ground connection, the feeder ear Vin of switch chip U1 be connected on its pin VCC and with electricity Pond 2 is connected, and the enable end EN2 of switch chip U1 is connected on its pin EN and is connected between R1 and the grid D of PMOS tube Q1, is opened The output end vo ut3 for closing chip U1 is connected on its pin VOUT and is connected with the feeder ear Vin3 of load control circuit 1, switchs The pin GND of chip U1 is grounded.
The working principle on above-mentioned anti-battery over-discharge road is as follows: (1) completing in electronic product in production line test and enter packet Before dress, specific program can be run by test fixture, so that the signal output end Vout1 output of load control circuit 1 is low Level, PMOS tube Q1 conducting, under the action of pull-up resistor R1, the enable end of switch chip U1 is low level, switch chip U1 It disconnects, does not export at this time, so that load control circuit 1 is because lacking power supply due to cisco unity malfunction, so that electronic product is in Off-position;(2) it when electronic product reaches in user hand, needs electronic product accessing external power supply, user by USB line Product is activated, Vin has electricity that the output end (i.e. voltage at R3) of bleeder circuit 31 is made to be high level at this time, i.e. PMOS tube Q1's Grid G is high level, and PMOS tube Q1 is turned off at this time, and due to the presence of R1, the enable end of switch chip U1 is high level at this time, The electric energy of switch chip U1 conducting, battery 2 can supply load control circuit 1 by switch chip U1, and product works at this time; (3) after activating product, USB line is removed, since load control circuit 1 works normally, specific program is run, may make negative The signal output end Vout1 for carrying control circuit 1 exports high level, i.e. the grid G of PMOS tube Q1 is high level, and PMOS tube Q1 is closed Disconnected, under the action of pull-up resistor R1, the enable end of switch chip U1 is high level, switch chip U1 conducting, the electric energy of battery 2 Load control circuit 1 is supplied by switch chip U1, product fully relies on the work of battery 2 at this time.
PMOS tube Q1 and switch are realized by the control of load control circuit 1 in the anti-battery over-discharge road of the utility model The on-off of chip U1 makes controlled connection or disconnection between battery 2 and load control circuit 1, and can be activated by charging, significantly Battery 2 kwh loss of the electronic product after factory is reduced, 2 electricity of battery is zero after avoiding product long-time warehouse from storing Situation promotes 2 service life of battery, and guarantees that user can be used directly after taking product and activating, and promotes user experience.
Embodiment three
Referring to FIG. 4, it is additionally provided with diode D1 and diode D2, anode and the load control circuit 1 of diode D1 Signal output end Vout1 is connected, and cathode is connected with the other end of one end of R3, the grid G of PMOS tube Q1 and R2 respectively;Two pole Pipe D1 prevents the electric current to load control circuit 1 from flowing backward.The anode of diode D2 is connected with the other end of R2, and cathode is respectively with two The cathode of pole pipe D1, the grid G of PMOS tube Q1 are connected with the other end of R3, and diode D2 is prevented to external power supply feeder ear The electric current of Vin flows backward.
Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations; Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is carried out etc. With replacement;And these are modified or replaceed, various embodiments of the utility model technology that it does not separate the essence of the corresponding technical solution The spirit and scope of scheme.

Claims (6)

1. a kind of anti-battery over-discharge road, is used for electronic product, the electronic product includes load control circuit and is described negative Carry the battery of control circuit power supply, which is characterized in that the anti-battery over-discharge road includes:
ON-OFF control circuit, power input Vin1 are connected with the external power supply feeder ear Vin of the electronic product, enable control End EN1 processed is connected with the signal output end Vout1 of the load control circuit;
Load switching switch, and feeder ear Vin2 is connected with the battery, the output of enable end EN2 and the ON-OFF control circuit Vout2 is held to be connected, output end vo ut3 is connected with the feeder ear Vin3 of the load control circuit;
According to the level of the enabled control terminal EN1 of the ON-OFF control circuit, the signal control of the ON-OFF control circuit output The load switching switch is turned on or off.
2. anti-battery over-discharge road according to claim 1, which is characterized in that the ON-OFF control circuit includes:
Bleeder circuit, power input Vin4 are connected with the power input Vin1 of the ON-OFF control circuit, output end Vout4 is connected with the enabled control terminal EN1 of the ON-OFF control circuit;
The switch element of low level conducting, enabled control terminal EN3 are connected to the enabled control terminal EN1 and the bleeder circuit Output end vo ut4 between, input terminal Vin5 is connected by pull-up resistor with the power input Vin1;
Wherein the enable end EN2 of the load switching switch is connected to the input terminal Vin5 of the switch element of the low level conducting Between the pull-up resistor;
When the enabled control terminal EN1 of the ON-OFF control circuit exports low level, controls the load switching switch and disconnect, and When exporting high level, controls the load and switch switch conduction.
3. anti-battery over-discharge road according to claim 2, which is characterized in that the switch element of low level conducting is PMOS tube, the grid G of the PMOS tube are connected to the enabled control terminal EN1 and the bleeder circuit of the ON-OFF control circuit Between output end vo ut4, drain D is connected between the pull-up resistor and the enable end EN2 of the load switching switch, source electrode S ground connection.
4. anti-battery over-discharge road according to claim 3, which is characterized in that the anti-battery over-discharge road further include:
Diode D1, anode are connected with the signal output end Vout1, and cathode is connected to the output end of the bleeder circuit Between Vout4 and the grid G of the PMOS tube.
5. anti-battery over-discharge road according to claim 4, which is characterized in that the anti-battery over-discharge road further include:
Diode D2, anode are connected with the external power supply feeder ear Vin, cathode be connected to the cathode of the diode D1 with Between the grid G of the PMOS tube.
6. anti-battery over-discharge road according to any one of claims 1-5, which is characterized in that the external power supply power supply Holding Vin is the power output end of the USB port of the electronic product.
CN201920760437.3U 2019-05-24 2019-05-24 A kind of anti-battery over-discharge road Active CN209730867U (en)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112039152A (en) * 2020-08-27 2020-12-04 西安稳先半导体科技有限责任公司 Bluetooth earphone

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112039152A (en) * 2020-08-27 2020-12-04 西安稳先半导体科技有限责任公司 Bluetooth earphone

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