CN103022581A - Protection circuit and method and device for controlling same - Google Patents
Protection circuit and method and device for controlling same Download PDFInfo
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- CN103022581A CN103022581A CN2012103891297A CN201210389129A CN103022581A CN 103022581 A CN103022581 A CN 103022581A CN 2012103891297 A CN2012103891297 A CN 2012103891297A CN 201210389129 A CN201210389129 A CN 201210389129A CN 103022581 A CN103022581 A CN 103022581A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a protection circuit and a method and device for controlling the same, and aims to prevent voltage disturbance from influencing functions of electronic devices when a battery is put into a battery compartment, and improve the safety performance of the battery. The control circuit comprises a first switch, a second switch, a first resistor and a time delay circuit, wherein when a battery pack enters a working state, the first switch is closed to ensure that a grid electrode of the second switch obtains a critical voltage of a closed state and then enters the closed state after the current output by a cell passes through the time delay circuit and after a preset delay time; an anode of the cell is conducted with an anode of the battery pack, so that the voltage disturbance is prevented from influencing the functions of the electronic devices when a battery is put into a battery compartment; and when the battery pack is not in the working state, the first switch is turned off, the voltage of the grid electrode of the second switch is reduced to the critical voltage when the second switch enters the closed state, then the second switch enters a turned-off state, and the current output by the anode of the cell is turned off, so that the safety performance of the battery when the battery is not put into the battery compartment is improved.
Description
Technical field
The present invention relates to electronic applications, relate in particular to a kind of protective circuit and control method, device.
Background technology
In recent years, along with such as the popularizing of the products such as mobile phone, mobile computer, Video Camera, electric motor car, the secondary cell with charge function extensive use as a kind of energy supply device.At present, common secondary cell mainly can be divided into nickel-cadmium cell, Ni-MH battery, lithium ion battery on the market.
In actual applications, the battery that uses on the electronic equipment also can be called power brick (battery pack), hard contact on the power brick is the positive pole (Pack+) of power brick and the negative pole (Pack-) of power brick, wherein, power brick is the further packing of battery core to be generated obtain, battery core is responsible for providing electric current, and the positive pole of power brick (Pack+) links to each other with the positive pole (Cell+) of battery core, and the negative pole of power brick (Pack-) links to each other with the negative pole (Cell-) of battery core.
In the prior art, power brick is at the certain voltage of the Shi Douyou that dispatches from the factory, therefore, when power brick is inserted the battery compartment of electronic equipment, because the battery connector in the battery compartment has the elasticity speciality, can cause cell voltage generation disturbance, thereby affect the stability of device in the electronic equipment, the malfunction that easily causes some electronic devices and components of electronic equipment, even lost efficacy, and then damage, for example, the client identification module of portable terminal (SubscriberIdentity Module, SIM) is stuck in the situation of spread of voltage and easily damages, and causes the user to lose.Simultaneously, owing between the positive and negative electrode of power brick voltage being arranged, conducting occuring easily, causes for the transportation of battery and to carry requirement relatively harsher.
Summary of the invention
The embodiment of the invention provides a kind of protective circuit and control method, device; can be in order to the voltage disturbance of avoiding battery when packing battery compartment into, to occur; with the impact of voltage disturbance on the electronic devices and components function, and prevent from the battery conducting that when not packing battery compartment into, meets accident from improving security performance.
The concrete technical scheme that the embodiment of the invention provides is as follows:
A kind of protective circuit, described protective circuit comprises: the first switch, second switch, the first resistance and delay circuit;
Wherein, an end of described the first switch is connected with the positive pole of battery core, and the other end of described the first switch is connected with delay circuit, and described the first switch is used for controlling described battery core to conducting and the shutoff of the electric current of described delay circuit output;
The source electrode of described second switch is connected with the positive pole of described battery core, the grid of described second switch is connected with an end of described delay circuit, described the first resistance, the drain electrode of described second switch is the positive pole of power brick, and described second switch is used for controlling conducting and the shutoff of described power brick output current;
One end of described the first resistance is connected with the grid of described second switch, and the other end of described the first resistance is connected with the negative pole of the negative pole of described battery core, described power brick, and described the first resistance is in sky for the grid that prevents described second switch and connects state;
Described delay circuit is connected between the grid of the other end of described the first switch and described second switch, is used for making described second switch timing closing.
A kind of control method of protective circuit, described method comprises:
When power brick enters the use state, closed the first switch, make the electric current of battery core output through the grid of delay circuit inflow second switch, and behind the process delay time of described delay circuit, the grid of second switch obtains to make described second switch enter the critical voltage of closure state, the source electrode of described second switch and drain electrode conducting are so that the anodal conducting of the positive pole of the described battery core that is connected with the source electrode of described second switch, the described power brick that is connected with the drain electrode of described second switch;
When power brick breaks away from the use state, turn-off described the first switch, the voltage of the grid of described second switch is down under the described critical voltage, source electrode and the drain electrode of described second switch enter off state, so that the positive pole of the positive pole of the described battery core that is connected with the source electrode of described second switch, the described power brick that is connected with the drain electrode of described second switch turn-offs.
A kind of control device of protective circuit, described device comprises:
The first control unit, be used for when power brick enters the use state, closed the first switch, make the electric current of battery core output through the grid of delay circuit inflow second switch, and behind the process delay time of described delay circuit, the grid of second switch obtains to make described second switch enter the critical voltage of closure state, the source electrode of described second switch and drain electrode conducting are so that the anodal conducting of the positive pole of the described battery core that is connected with the source electrode of described second switch, the described power brick that is connected with the drain electrode of described second switch;
The second control unit, be used for when power brick breaks away from the use state, turn-off described the first switch, the voltage of the grid of described second switch is down under the described critical voltage, source electrode and the drain electrode of described second switch enter off state, so that the positive pole of the positive pole of the described battery core that is connected with the source electrode of described second switch, the described power brick that is connected with the drain electrode of described second switch turn-offs.
The embodiment of the invention provides a kind of protective circuit and control method, device, wherein, protective circuit comprises: the first switch, second switch, the first resistance and delay circuit, simultaneously, the annexation of each device is specially: an end of the first switch is connected with the anodal Cell+ of battery core, and the other end is connected with delay circuit; The source electrode of second switch is connected with the anodal Cell+ of battery core, and grid is connected with an end of delay circuit, the first resistance, drains to be the anodal Pack+ of power brick; The other end of the first resistance is connected with the negative pole Cell-of battery core, the negative pole Pack-of power brick; Delay circuit is connected between the grid of the other end, second switch of the first switch.When power brick enters the use state, closed the first switch, make the electric current of battery core output behind delay circuit, after through default delay time, the grid of second switch obtains to make second switch enter the critical voltage of closure state, the source electrode of second switch and drain electrode conducting, so that the anodal Cell+ of the battery core that is connected with the source electrode of second switch, the anodal Pack+ conducting of the power brick that is connected with the drain electrode of second switch, the anodal Cell+ of battery core is by the second switch output current, the voltage disturbance of having avoided battery to occur when packing battery compartment into is with the impact of voltage disturbance on the electronic devices and components function; When wanting to make power brick break away from the use state, turn-off the first switch, and then the voltage at the grid place of second switch is down under the critical voltage that enters closure state, source electrode and the drain electrode of second switch enter off state, battery core the electric current of anodal Cell+ output turn-off, thereby prevented when not packing battery compartment into, the meet accident emission of conducting of battery, improved the security performance of battery.
Description of drawings
Fig. 1 is the structural representation of protective circuit in the embodiment of the invention;
Fig. 2 is the schematic diagram of second switch in the embodiment of the invention;
Fig. 3 is the detailed structure schematic diagram of protective circuit in the embodiment of the invention.
Embodiment
The voltage disturbance that when packing battery compartment into, occurs for fear of battery; with the impact of voltage disturbance on the electronic devices and components function; and prevent from the battery conducting that when not packing battery compartment into, meets accident from improving security performance, the embodiment of the invention provides a kind of protective circuit and control method, device.Below in conjunction with Figure of description the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, is not intended to limit the present invention.And in the situation that do not conflict, embodiment and the feature among the embodiment among the application can make up mutually.
Below in conjunction with accompanying drawing the preferred embodiment of the present invention is elaborated.
The protective circuit that the embodiment of the invention provides comprises as shown in Figure 1:
The first switch SW 1, second switch SW2, the first resistance R 1 and delay circuit RC.Wherein, the annexation of each device is specially:
One end of the first switch SW 1 is connected with the anodal Cell+ of battery core, and the other end of the first switch SW 1 is connected with delay circuit RC, and the first switch SW 1 is used for the control battery core to conducting and the shutoff of the electric current of delay circuit RC output;
The source electrode of second switch SW2 is connected with the anodal Cell+ of battery core, the grid of second switch SW2 is connected with an end of delay circuit RC, the first resistance R 1, the drain electrode of second switch SW2 is the anodal Pack+ of power brick, and second switch SW2 is used for controlling conducting and the shutoff of described power brick output current;
One end of the first resistance R 1 is connected with the grid of second switch SW2, and the other end of the first resistance R 1 is connected with the negative pole Cell-of battery core, the negative pole Pack-of power brick, and the first resistance R 1 is in sky for the grid that prevents second switch SW2 and connects state;
Delay circuit RC is connected between the grid of the other end, second switch SW2 of the first switch SW 1, is used for making second switch SW2 timing closing.
In actual applications, the first switch SW 1 is position switch: claiming again limit switch, is a kind of little electric current master control electrical apparatus commonly used, is used for realizing the detection of sequential control, positioning control or location status, has been widely used in a lot of fields.The first switch SW 1 is divided into mechanical switch and electric induction type switch, wherein, mechanical switch utilizes the collision of manufacturing machine moving component to make its contact action realize connecting or the disjunction control circuit, reach certain control purpose, usually, this class switch is used to position or the stroke of limit mechanical motion, make movable machinery by certain position or stroke automatically stop, counter motion, variable motion or automatic back and forth movement etc.; The electric induction type approach switch claims again the non-contact travel switch, divides by operation principle, mainly contains high-frequency oscillation type, Hall-type, ultrasonic type, condenser type, differential lines ring type, magneto etc., and wherein, high-frequency oscillation type is the most commonly used.
For example, when the first switch SW 1 is used the Hall-type switch, be implemented as follows:
The magnet corresponding with the Hall-type switch is installed in battery compartment, and when power brick during near battery compartment, the first switch SW 1 enters the induction range of magnet, owing to magnetic field effect, and the first switch closure.
In embodiments of the present invention; consult shown in Figure 2; second switch SW2 is the N-type metal-oxide half field effect transistor; need to prove; transistor for the protective circuit field; drain electrode and source electrode do not have clear and definite difference, so the transistorized source electrode of mentioning in the embodiment of the invention can be transistorized drain electrode, and transistorized drain electrode also can be transistorized source electrode.That is to say, in embodiments of the present invention, the connected mode of transistorized source electrode and drain electrode can be exchanged, and namely transistorized source electrode also can link to each other with the anodal Pack+ of power brick, and drain electrode links to each other with the anodal Cell+ of battery core.
Delay circuit RC has been widely used in a lot of fields, wherein, delay circuit RC is in resistance R of capacitor C series connection, when battery core is charged to capacitor C, resistance R has played the effect of a current limliting, and wherein, the resistance of resistance R and the capacity of capacitor C are larger, the time of charging is just longer, and the time of time-delay is exactly this charging process.
Consult shown in Figure 3ly, in embodiments of the present invention, delay circuit RC comprises: the second resistance R 2 and the first capacitor C 1;
Wherein, an end of the second resistance R 2 is connected with the other end of the first switch SW 1, and the other end of the second resistance R 2 is connected with the grid of second switch SW2;
One end of the first capacitor C 1 is connected with the grid of the other end of the second resistance R 2, second switch SW2, and the other end of the first capacitor C 1 is connected with the other end of the first resistance R 1, the negative pole Pack-of power brick.
When battery core is given 1 charging of the first capacitor C, the second resistance R 2 has played the effect of a current limliting, namely increase the time of the first capacitor C 1 charging, when the capacity of the resistance of the second resistance R 2 and the first capacitor C 1 larger, the time that the first capacitor C 1 voltage rises is just slower, and then the first capacitor C 1 voltage to reach the required time of certain value just longer, the time of time-delay is exactly that battery core is charged to voltage to the first capacitor C 1 and reaches the required time of certain value, the delay time computing formula of delay circuit RC:
Delay time=-* C1n[(E-V)/E] (formula one)
Wherein, "-" is negative sign; R is the resistance of the second resistance R 2; C is the capacity of the first capacitor C 1; E is the voltage at delay circuit RC two ends; V is the magnitude of voltage that the first capacitor C 1 will reach.
For example: the resistance R of the second resistance R 2 is 150K, and the capacity of the first capacitor C 1 is 46UF, and the voltage E at delay circuit RC two ends is 12V, and the magnitude of voltage 0V that the first capacitor C 1 will reach is 3V, and then the delay time of delay circuit RC is 2S according to formula one result of calculation.
In actual applications, resistance can be divided into fixed resistance, adjustable resistance, special resistance (sensitive resistance) according to resistance characteristic, and resistance can not be regulated, and we are referred to as fixed value resistance or fixed resistance, and can regulate, we are referred to as adjustable resistance.In embodiments of the present invention, the first resistance R 1 and the second resistance R 2 can be fixed resistance simultaneously both, can be adjustable resistance simultaneously also, can also be for being special resistance simultaneously; Perhaps, the first resistance R 1 and the second resistance R 2 adopt the resistance of different resistance characteristics, as, the first resistance R 1 adopts fixed resistance, and the second resistance R 2 adopts adjustable resistances, and perhaps, the first resistance R 1 adopts special resistance, and the second resistance R 2 adopts fixed resistances.
Better, in order to control more easily the voltage of the anodal Pack+ output of power brick, the delay time of the delay circuit of the second resistance R 2 and the first capacitor C 1 composition is regulated with reference to formula one.
The protective circuit that provides in order to further specify the embodiment of the invention, the below specifies operation principle.
In embodiments of the present invention, when power brick enters the use state, that is to say, when power brick is put into the battery compartment of electronic equipment, the first switch SW 1 is by induction, become closure state from off-state, after the first switch SW 1 closure, the circuit that delay circuit RC and battery core form is closure state, battery core is charged to the first capacitor C 1, make the electric current of battery core output through the grid of delay circuit RC inflow second switch SW2, behind the default delay time through delay circuit RC, that is to say, behind the first capacitor C 1 charging certain hour, when the electric weight of the first capacitor C 1 reaches certain value, the grid of second switch SW2 obtains to make second switch SW2 enter the critical voltage of closure state, the source electrode of second switch SW2 and drain electrode conducting, the anodal Cell+ of the battery core that is connected with the source electrode of second switch SW2, the anodal Pack+ conducting of the power brick that is connected with the drain electrode of second switch SW2, the anodal Cell+ of battery core is by second switch SW2 output current.
In embodiments of the present invention, when power brick breaks away from the use state, turn-off the first switch SW 1, therefore, the first capacitor C 1 is charged.Second switch SW2 in the embodiment of the invention is the N-type transistor, the transistorized characteristics of N-type are, when the electrical potential difference that the electromotive force that the electromotive force of grid deducts the electrical potential difference of electromotive force of source electrode or grid deducts the electromotive force of drain electrode reaches default threshold value, transistor is conducting state, otherwise be off state, therefore, when if the first capacitor C 1 capacity charges, then the current potential of transistorized grid is electronegative potential, that is to say, the voltage at the grid place of second switch SW2 is down under the critical voltage that enters closure state, source electrode and the drain electrode of second switch SW2 enter off state, the anodal Cell+ of the battery core that the source electrode of second switch SW2 connects, the anodal Pack+ of the power brick that is connected with the drain electrode of second switch SW2 turn-offs, that is to say, the electric current of the anodal Cell+ output of battery core turn-offs, thereby has prevented the battery conducting that meets accident when not packing battery compartment into, improved the security performance (for example, battery security performance in transportation) of battery when not packing the battery compartment of mobile device into.
In embodiments of the present invention, closed or turn-off the first switch SW 1 before, the also resistance by the second resistance R 2 is set and the capacity setting delay time of the first capacitor C 1.
In the embodiment of the invention, in closure or before turn-offing the first switch SW 1, the state that detects power brick still breaks away from the use state for entering the use state, wherein, can detect in the following way the state of power brick: whether the distance that detects power brick and battery compartment reaches predeterminable range, if think that then power brick is for entering the use state; Otherwise, think that power brick breaks away from the use state.
The embodiment of the invention also provides a kind of control device of protective circuit, comprising:
The first control unit, be used for when power brick enters the use state, closed the first switch, make the electric current of battery core output through the grid of delay circuit inflow second switch, and behind the process delay time of delay circuit, the grid of second switch obtains to make second switch to enter the critical voltage of closure state, and the source electrode of second switch and drain electrode conducting are so that the anodal conducting of the positive pole of the battery core that is connected with the source electrode of second switch, the power brick that is connected with the drain electrode of second switch;
The second control unit, be used for when power brick breaks away from the use state, turn-off the first switch, the voltage of the grid of second switch is down under the critical voltage, source electrode and the drain electrode of second switch enter off state, so that the positive pole of the positive pole of the battery core that is connected with the source electrode of second switch, the power brick that is connected with the drain electrode of second switch turn-offs.
In sum, the embodiment of the invention provides a kind of protective circuit and control method, device, wherein, protective circuit comprises: the first switch, second switch, the first resistance and delay circuit, simultaneously, the annexation of each device is specially: an end of the first switch is connected with the anodal Cell+ of battery core, and the other end is connected with delay circuit; The source electrode of second switch is connected with the anodal Cell+ of battery core, and grid is connected with an end of delay circuit, the first resistance, drains to be the anodal Pack+ of power brick; The other end of the first resistance is connected with the negative pole Cell-of battery core, the negative pole Pack-of power brick; Delay circuit is connected between the grid of the other end, second switch of the first switch.When power brick enters the use state, closed the first switch, make the electric current of battery core output behind delay circuit, after through default delay time, the grid of second switch obtains to make second switch enter the critical voltage of closure state, the source electrode of second switch and drain electrode conducting, so that the anodal Cell+ of the battery core that is connected with the source electrode of second switch, the anodal Pack+ conducting of the power brick that is connected with the drain electrode of second switch, the anodal Cell+ of battery core is by the second switch output current, the voltage disturbance of having avoided battery to occur when packing battery compartment into is with the impact of voltage disturbance on the electronic devices and components function; When wanting to make power brick break away from the use state, turn-off the first switch, and then the voltage at the grid place of second switch is down under the critical voltage that enters closure state, source electrode and the drain electrode of second switch enter off state, battery core the electric current of anodal Cell+ output turn-off, thereby prevented when not packing battery compartment into, the meet accident emission of conducting of battery, improved the security performance of battery.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware implementation example, complete implement software example or in conjunction with the form of the embodiment of software and hardware aspect.And the present invention can adopt the form of the computer program of implementing in one or more computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) that wherein include computer usable program code.
The present invention is that reference is described according to flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device producing a machine, so that the instruction of carrying out by the processor of computer or other programmable data processing device produces the device that is used for realizing in the function of flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, so that the instruction that is stored in this computer-readable memory produces the manufacture that comprises command device, this command device is realized the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device, so that carry out the sequence of operations step producing computer implemented processing at computer or other programmable devices, thereby be provided for realizing the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame in the instruction that computer or other programmable devices are carried out.
Although described the preferred embodiments of the present invention, in a single day those skilled in the art get the basic creative concept of cicada, then can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification to the embodiment of the invention and not break away from the spirit and scope of the embodiment of the invention.Like this, if these of the embodiment of the invention are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (12)
1. a protective circuit is characterized in that, described protective circuit comprises: the first switch, second switch, the first resistance and delay circuit;
Wherein, an end of described the first switch is connected with the positive pole of battery core, and the other end of described the first switch is connected with delay circuit, and described the first switch is used for controlling described battery core to conducting and the shutoff of the electric current of described delay circuit output;
The source electrode of described second switch is connected with the positive pole of described battery core, the grid of described second switch is connected with an end of described delay circuit, described the first resistance, the drain electrode of described second switch is the positive pole of power brick, and described second switch is used for controlling conducting and the shutoff of described power brick output current;
One end of described the first resistance is connected with the grid of described second switch, and the other end of described the first resistance is connected with the negative pole of the negative pole of described battery core, described power brick, and described the first resistance is in sky for the grid that prevents described second switch and connects state;
Described delay circuit is connected between the grid of the other end of described the first switch and described second switch, is used for making described second switch timing closing.
2. protective circuit as claimed in claim 1 is characterized in that, described delay circuit comprises: the second resistance and the first electric capacity;
Wherein, an end of described the second resistance is connected with the other end of described the first switch, and the other end of described the second resistance is connected with the grid of described second switch;
One end of described the first electric capacity is connected with the other end of described the second resistance, the grid of described second switch, and the other end of described the first electric capacity is connected with the other end of described the first resistance, the negative pole of described power brick.
3. protective circuit as claimed in claim 1 or 2 is characterized in that, described second switch is the N-type metal-oxide half field effect transistor.
4. protective circuit as claimed in claim 1 or 2 is characterized in that, described the first switch is the position switch of mechanical position switch or electric induction type.
5. the control method of a protective circuit is characterized in that, described method comprises:
When power brick enters the use state, closed the first switch, make the electric current of battery core output through the grid of delay circuit inflow second switch, and behind the process delay time of described delay circuit, the grid of second switch obtains to make described second switch enter the critical voltage of closure state, the source electrode of described second switch and drain electrode conducting are so that the anodal conducting of the positive pole of the described battery core that is connected with the source electrode of described second switch, the described power brick that is connected with the drain electrode of described second switch;
When power brick breaks away from the use state, turn-off described the first switch, the voltage of the grid of described second switch is down under the described critical voltage, source electrode and the drain electrode of described second switch enter off state, so that the positive pole of the positive pole of the described battery core that is connected with the source electrode of described second switch, the described power brick that is connected with the drain electrode of described second switch turn-offs.
6. method as claimed in claim 5 is characterized in that, in described closure or before turn-offing described the first switch, also comprises:
Resistance by the second resistance is set and the described delay time of capacity setting of the first electric capacity.
7. method as claimed in claim 5 is characterized in that, in described closure or before turn-offing described the first switch, also comprises:
Detect the state of described power brick;
Wherein, the state of described power brick comprises use state and the disengaging use state of entering.
8. method as claimed in claim 7 is characterized in that, the state of the described power brick of described detection comprises:
Whether the distance that detects described power brick and described battery compartment reaches predeterminable range;
When reaching predeterminable range, then described power brick is for entering the use state;
When not reaching predeterminable range, then described power brick breaks away from the use state.
9. the control device of a protective circuit is characterized in that, described device comprises:
The first control unit, be used for when power brick enters the use state, closed the first switch, make the electric current of battery core output through the grid of delay circuit inflow second switch, and behind the process delay time of described delay circuit, the grid of second switch obtains to make described second switch enter the critical voltage of closure state, the source electrode of described second switch and drain electrode conducting are so that the anodal conducting of the positive pole of the described battery core that is connected with the source electrode of described second switch, the described power brick that is connected with the drain electrode of described second switch;
The second control unit, be used for when power brick breaks away from the use state, turn-off described the first switch, the voltage of the grid of described second switch is down under the described critical voltage, source electrode and the drain electrode of described second switch enter off state, so that the positive pole of the positive pole of the described battery core that is connected with the source electrode of described second switch, the described power brick that is connected with the drain electrode of described second switch turn-offs.
10. device as claimed in claim 9 is characterized in that, described the first control unit also is used for, before described the first switch of closure, and the resistance by the second resistance is set and the described delay time of capacity setting of the first electric capacity; Described the second control unit also is used for, before turn-offing described the first switch, and the resistance by the second resistance is set and the described delay time of capacity setting of the first electric capacity.
11. device as claimed in claim 9 is characterized in that, described the first control unit also is used for: before described the first switch of closure, the state that detects described power brick enters the use state; Described the second control unit also is used for: before turn-offing described the first switch, the state that detects described power brick breaks away from the use state.
12. device as claimed in claim 11 is characterized in that, described the first control unit and described the second control unit also are used for:
Detect in the following way the state of described power brick:
Whether the distance that detects described power brick and described battery compartment reaches predeterminable range, and when reaching predeterminable range, then described power brick is for entering the use state; When not reaching predeterminable range, then described power brick breaks away from the use state.
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| CN201210389129.7A CN103022581B (en) | 2012-10-15 | 2012-10-15 | A kind of protective circuit and control method, device |
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| CN201210389129.7A CN103022581B (en) | 2012-10-15 | 2012-10-15 | A kind of protective circuit and control method, device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106602155A (en) * | 2016-12-19 | 2017-04-26 | 珠海格力电器股份有限公司 | Battery |
| CN108539817A (en) * | 2016-08-26 | 2018-09-14 | 常州爱上学教育科技有限公司 | Avoid the battery automatic protective system and its working method of short circuit |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101267122A (en) * | 2008-01-02 | 2008-09-17 | 何岳明 | Charging and discharging protection circuit for multiple serial lithium battery |
| CN101741121A (en) * | 2009-12-30 | 2010-06-16 | 上海德朗能电池有限公司 | Electronic switch arranged on lithium battery pack protecting board |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108539817A (en) * | 2016-08-26 | 2018-09-14 | 常州爱上学教育科技有限公司 | Avoid the battery automatic protective system and its working method of short circuit |
| CN106602155A (en) * | 2016-12-19 | 2017-04-26 | 珠海格力电器股份有限公司 | Battery |
| CN106602155B (en) * | 2016-12-19 | 2024-03-15 | 珠海格力电器股份有限公司 | Battery cell |
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| CN103022581B (en) | 2015-08-12 |
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