CN109193834A - Over-pressure safety device, method and system - Google Patents

Over-pressure safety device, method and system Download PDF

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Publication number
CN109193834A
CN109193834A CN201811068610.XA CN201811068610A CN109193834A CN 109193834 A CN109193834 A CN 109193834A CN 201811068610 A CN201811068610 A CN 201811068610A CN 109193834 A CN109193834 A CN 109193834A
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charging
current value
output
default
chip
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CN109193834B (en
Inventor
张立新
周毕兴
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Shenzhen Waterward Information Co Ltd
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Shenzhen Water World Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention proposes a kind of over-pressure safety devices, method and system, wherein over-pressure safety device includes CPU, charging port, overvoltage protection chip and charging management chip, charging port and charging management chip pass through overvoltage protection chip circuit connection, CPU and charging management chip circuit connection, when charging to device end, a lesser initial value is first exported by controlling charging current, then it incrementally increases according to certain increase rate to the normal value of charging current, it solves because momentary charge electric current is excessive, cause to shake, so that charging voltage is too high to the problem of charging normal.

Description

Over-pressure safety device, method and system
Technical field
The present invention relates to electronic equipment overvoltage protection field, especially relate to a kind of over-pressure safety device, method and System.
Background technique
Overvoltage protection mainly prevents overvoltage or static discharge from damaging to electronic component, is widely used in Various electronic system products, especially in electronics, basic principle is: the different portions generated according to over-voltage in circuit Position, different overvoltage protection chips is added, when reach-constant voltage threshold values when, overvoltage protection chip can automatically cut off connection, from And be loaded into the energy of over-voltage will not on the electronic device of overvoltage protection chip rear end, protect the electronic device of rear end not by The energy of over-voltage damages.
On electronics, overvoltage protection chip is widely used in charge port.It is higher than over-voltage when charging voltage moment When protecting the threshold voltage of chip, overvoltage protection chip automatically cuts off the connection of the electronic component of charger and rear end.It disconnects If overvoltage protection chip can be automatic after external charging voltage decreases below the threshold voltage of overvoltage protection chip after connection Start the connection of the electronic component of charger and rear end.But when external charger voltage decreases below overvoltage protection The threshold voltage critical point of chip, when overvoltage protection chip starts the connection of the electronic component of charger and rear end, moment is just A big charging current is had, immediate current variation can generate ringing at charger connecting line end, charging is caused to input Holding voltage instantaneous is more than the shutdown voltage threshold of over-voltage, and because the high-speed response of over-voltage chip can turn off rapidly.Charging voltage One is excessively high, and overvoltage protection chip automatically cuts off the connection of the electronic component of charger and rear end immediately, at this time charger voltage The threshold voltage critical point of overvoltage protection chip is decreased below again, and overvoltage protection chip starts the electronics member of charger and rear end The connection of device, moment just has a big charging current, and generates concussion, causes charging voltage excessively high.So circulation is anti- It is multiple, cause electronics charging always and disconnect charging room circulation, although increasing the return difference or drop of overvoltage threshold voltage The response speed of low over-voltage can improve this phenomenon, but can reduce the performance of over-voltage.Such probability is encountered in actual use It is smaller, once but user encounter, will result in electronics can not charge, and greatly affected user in electricity Experience on sub- communication apparatus.
Summary of the invention
The main object of the present invention is to provide a kind of over-pressure safety device, method and system, for solving overvoltage protection core It leads to the problem of concussion when the connection of piece starting charger and the electronic component of rear end and causes charging voltage excessively high.
The present invention proposes a kind of over-pressure safety device, including CPU, charging port, overvoltage protection chip and Charge Management core Piece, charging port and charging management chip are electrically connected by overvoltage protection chip, and CPU is electrically connected with charging management chip；Charging For exporting charging current, charging current is exported through overvoltage protection chip to charging port, charging port and equipment managing chip Terminal connection, for inputting charging current to device end；Overvoltage protection chip is used to detect the charging voltage of charging port, mistake Pressure protection chip disconnects the electrical connection between charging port and charging management chip when charging voltage is greater than predetermined voltage threshold, And when charging voltage is less than predetermined voltage threshold, it is again coupled to the charging port and charging management chip disconnected, CPU is used for When charging port and charging management chip are again coupled to, reduce the initial value of charging current and control its increase rate.
Further, it has also connected between charging port and overvoltage protection chip a resistance.
The invention also provides a kind of over-voltage protection method, apply on above-mentioned over-pressure safety device, comprising:
Judge whether the charging current of charging management chip output from the first pre-set current value sports zero, wherein first Pre-set current value is the normal value for exporting charging current；
If sporting zero, whether real-time detection overvoltage protection chip is on connection status；
If overvoltage protection chip is on connection status, charging management chip is controlled according to the first default output rule Charging current is exported, until charging current reverts to the first pre-set current value；Wherein, the first default output rule is setting charging The initial value of electric current is the second pre-set current value, and increases charging current according to the first default rate that increases during output, Second pre-set current value is less than the first pre-set current value.
Further, judging whether the charging current of charging management chip output from the first pre-set current value sports zero The step of before, comprising:
Judge whether there is device end access；
If there is device end access, charging management chip is controlled with the first pre-set current value and exports charging current.
Further, if there is device end access, charging management chip is controlled with the first pre-set current value and exports charging The step of electric current, comprising:
If there is device end access, the facility information of device end is read；
The size of the first pre-set current value is determined according to facility information；
It controls charging management chip and charging current is exported with the first pre-set current value.
Further, overvoltage protection chip includes field-effect tube, and charging port and charging management chip pass through field-effect tube Electrical connection；If sporting zero, the step of whether real-time detection overvoltage protection chip is on connection status, comprising:
If sporting zero, whether real-time detection field-effect tube is on connection status.
Further, if overvoltage protection chip is on connection status, it is pre- according to first to control charging management chip If output rule output charging current, until the step of charging current reverts to the first pre-set current value, comprising:
Judge whether charging current during increase sports zero again；
If sporting zero again, whether real-time detection overvoltage protection chip is on connection status；
If overvoltage protection chip is on connection status, charging management chip is controlled according to the second default output rule Charging current is exported, until charging current reverts to the first pre-set current value；Wherein, the second default output rule is setting charging The initial value of electric current is third pre-set current value, and increases charging current according to the second default rate that increases during output, Third pre-set current value is less than or equal to the second pre-set current value, and the second default rate that increases is less than the first default increase rate.
The invention also provides a kind of overvoltage protective systems, comprising:
Whether first judgment module, the charging current for judging charging management chip output are prominent from the first pre-set current value It becomes zero, wherein the first pre-set current value is the normal value for exporting charging current；
First detection module, if whether real-time detection overvoltage protection chip is on connection shape for sporting zero State；
First output module controls charging management chip and presses if being on connection status for overvoltage protection chip According to the first default output rule output charging current, until charging current reverts to the first pre-set current value.
Further, comprising:
Read module, if reading the facility information of device end for there is device end access；
Determining module, for determining the size of the first pre-set current value according to facility information；
Third output module exports charging current for controlling charging management chip with the first pre-set current value.
Further, comprising:
Third judgment module, for judging whether charging current during increase sports zero again；
Second detection module, if for sporting zero again, real-time detection overvoltage protection chip whether the company of being on Connect state；
4th output module controls charging management chip and presses if being on connection status for overvoltage protection chip According to the second default output rule output charging current, until charging current reverts to the first pre-set current value.
Compared with prior art, the present invention beneficial effect is: the invention proposes a kind of over-pressure safety device, method and being System when being attached charging to device end again, is first exported one smaller after over-voltage disconnection by control charging current Initial value, then incrementally increase according to certain increase rate to the normal value of charging current, solve because momentary charge electricity It flows through greatly, causes to shake, so that charging voltage is too high to the problem of charging normal.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of one embodiment of over-pressure safety device of the present invention；
Fig. 2 is the structural schematic diagram of another embodiment of over-pressure safety device of the present invention；
Fig. 3 is the step schematic diagram of over-voltage protection method first embodiment of the present invention；
Fig. 4 is signal the step of judging whether there is device end access in over-voltage protection method second embodiment of the present invention Figure；
Fig. 5 is that control charging management chip is advised according to the second default output in the 5th embodiment of over-voltage protection method of the present invention The step schematic diagram then exported；
Fig. 6 is the module frame schematic diagram of overvoltage protective system first embodiment of the present invention；
Fig. 7 is to judge whether there is the module frame that device end accesses in overvoltage protective system second embodiment of the present invention to show It is intended to；
Fig. 8 is to determine the first pre-set current value according to the device end of access in overvoltage protection 3rd embodiment of the present invention Module frame schematic diagram；
Fig. 9 is the module frame signal for judging overvoltage protection chip in overvoltage protection fourth embodiment of the present invention and whether being connected Figure；
Figure 10 is that control charging management chip is regular according to the second default output in the 5th embodiment of overvoltage protection of the present invention The module frame schematic diagram of output；
Figure 11 is the module frame schematic diagram of the default output rule of setting first in overvoltage protection sixth embodiment of the present invention；
Figure 12 is the module frame schematic diagram that alerting signal is issued in the 7th embodiment of overvoltage protection of the present invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its His embodiment, shall fall within the protection scope of the present invention.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute is only used in the embodiment of the present invention In explaining in relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, if should When particular pose changes, then directionality instruction also correspondingly changes correspondingly, and the connection, which can be, to be directly connected to, It can be and be indirectly connected with.
In addition, the description for being such as related to " first ", " second " in the present invention is used for description purposes only, and should not be understood as Its relative importance of indication or suggestion or the quantity for implicitly indicating indicated technical characteristic.Define as a result, " first ", The feature of " second " can explicitly or implicitly include at least one of the features.In addition, the technical side between each embodiment Case can be combined with each other, but must be based on can be realized by those of ordinary skill in the art, when the combination of technical solution Conflicting or cannot achieve when occur will be understood that the combination of this technical solution is not present, also not the present invention claims guarantor Within the scope of shield.
As shown in Figure 1, proposing a kind of over-pressure safety device in the embodiment of the present invention, including CPU, charging port 1, over-voltage Chip 2 and charging management chip 3 are protected, charging port 1 and charging management chip 3 pass through 2 circuit connection of overvoltage protection chip, In some embodiments, overvoltage protection chip 2 includes field-effect tube 21, and charging port 1 and charging management chip 3 pass through field-effect tube 21 circuit connections, the field-effect tube 21 are metal-oxide-semiconductor.CPU and 3 circuit connection of charging management chip；Charging management chip 3 is for controlling System output charging current, charging current reach charging port 1 through overvoltage protection chip 2, and charging port 1 is connect with device end, For giving device end to input charging current, overvoltage protection chip 2 is used to detect the charging voltage of charging port 1, and according to filling Piezoelectric voltage decides whether to disconnect the circuit connection between charging port 1 and charging management chip 3, and CPU is for adjusting charging electricity The size and increase rate of stream.User is provided with maximum voltage threshold in overvoltage protection chip 2 in advance, works as overvoltage protection chip 2 when detecting that the charging voltage of charging port 1 reaches maximum voltage threshold, and the field-effect tube 21 in overvoltage protection chip 2 will Automatically it disconnects, disconnects the circuit connection between charging management chip 3 and charging port 1, protection is connect with charging port 1 Electronic equipment safety.When overvoltage protection chip 2 detects that the charging voltage of charging port 1 decreases below maximum voltage threshold When value, overvoltage protection chip 2 can start circuit connection between charging management chip 3 and charging port 1 automatically again, continue to filling The electronic equipment that electric port 1 is connected charges.And charging end it is normally connect in charging management chip 3 with charging port 1, i.e., When the electronic equipment of 1 connection of mouth is in normal charging condition, CPU controls the normal of the charging current that charging management chip 3 exports Value size is the first pre-set current value.In some embodiments, start charging management chip 3 to solve overvoltage protection chip 2 When with the connection of charging port 1, momentary charge electric current is excessive, generates concussion, leads to the problem that charging voltage is excessively high, CPU is real-time Whether detection overvoltage protection chip 2 is disconnected the connection of charging management chip 3 Yu charging port 1 automatically, when overvoltage protection chip 2 When being disconnected connection of the charging management chip 3 with charging port 1 automatically, i.e. CPU detects the charging that charging management chip 3 exports When electric current sports zero by the first pre-set current value, CPU will carry out the first default output rule to charging management chip 3 and match It sets, wherein include the size for the charging current initial value that control charging management chip 3 exports in the above-mentioned first default output rule For the second pre-set current value, the second pre-set current value is less than the first pre-set current value, pre- according to first then during output Charging current is increased into the first pre-set current value from the second pre-set current value if increasing rate.I.e. when overvoltage protection chip 2 from When the connection of dynamic starting charging management chip 3 and charging port 1, according to the first default output rule, CPU controls Charge Management core The size for the charging current initial value that piece 3 exports is the second pre-set current value, and the second pre-set current value is less than the first predetermined current Charging current is increased to first from the second pre-set current value according to the first default increase rate then during output by value Pre-set current value first exports a lesser initial value by controlling charging current, then increase rate gradually according to first The normal value for increasing to charging current solves because momentary charge electric current is excessive, causes to shake, so that charging voltage is excessively high And the problem of can not charging normal.Such as the normal value of the charging current of output is the first pre-set current value 500mA, control output The initial value of charging current be the second pre-set current value 50mA, during output, charging current default increases according to first Rate is incrementally increased from the second pre-set current value 50mA to the first pre-set current value 500mA.In some embodiments, first is default Increase rate and be set as every 10ms and increase 50mA, i.e., the increase rate that charging current is according to 50mA, 100mA, 150mA ... is from second Pre-set current value 50mA is incrementally increased to the first pre-set current value 500mA, is finally persistently exported according to the first pre-set current value, just Often charging.In further embodiments, the output of charging current is carried out according to the first default output rule in charging management chip 3 In the process, still whether real-time detection overvoltage protection chip 2 is disconnected the company of charging management chip 3 Yu charging port 1 to CPU automatically It connects, when overvoltage protection chip 2 is disconnected the connection of charging management chip 3 and charging port 1 automatically again, i.e., CPU is detected When the charging current that charging management chip 3 exports sports zero again, show that the instant value of the charging current of output is still excessive, Cause charging voltage excessively high, can not be charged normal.CPU will carry out the second default output to charging management chip 3 at this time The configuration of rule, it is pre- according to second when the connection of starting charging management chip 3 and charging port 1 automatically of overvoltage protection chip 2 If output rule, it is third pre-set current value that the charging current initial value that CPU control charging management chip 3 exports, which is size, the Three pre-set current values are less than or equal to the second pre-set current value, then during output, according to second it is default increase rate from Third pre-set current value increases to the first pre-set current value, and the second default rate that increases is less than the first default increase rate, i.e., logical It crosses control charging current and first exports a lesser initial value, then increase rate according to second and increase from third pre-set current value To the first pre-set current value, it is because according to the less than the first default purpose for increasing rate that setting second is default, which to increase rate, One it is default increase rate output charging current during, overvoltage protection chip 2 be disconnected automatically again charging management chip 3 with The connection of charging port 1 shows to be exported according to the first default rate that increases, momentary charge electric current is still excessive, causes Charging voltage is excessively high, leads to not charge normal, therefore reduces increase rate when charging current output, is filled by reducing moment The size of electric current solves to cause overvoltage protection chip 2 to disconnect charging management chip 3 and charging automatically because charging voltage is excessively high The problem of connection of port 1.Such as the normal value of the charging current of output is the first pre-set current value 500mA, automatic starting connects After connecing, control the charging current of output initial value be third pre-set current value 50mA, during output, charging current according to The second default rate that increases is incrementally increased from the second pre-set current value 50mA to the first pre-set current value 500mA.In some implementations In example, the second default rate that increases is set as every 10ms increase 25mA, i.e., the increasing that charging current is according to 50mA, 75mA, 100mA ... Big rate is incrementally increased from third pre-set current value 50mA to the first pre-set current value 500mA, finally according to the first predetermined current The lasting output of value, charges normal.Similarly, the defeated of charging current is carried out according to the second default output rule in charging management chip 3 During out, still whether real-time detection overvoltage protection chip 2 is disconnected charging management chip 3 and charging port 1 to CPU automatically Connection, and when overvoltage protection chip 2 is disconnected the connection of charging management chip 3 and charging port 1 automatically again, i.e. CPU inspection The charging current of the output of charging management chip 3 is measured when sporting zero again, executes similar operation, continues to reduce control charging Managing chip 3 exports increase rate when charging current, until restoring normally to connect between charging management chip 3 and charging port 1, Until i.e. charging management chip 3 persistently exports charging current according to the first pre-set current value.In some embodiments, if CPU is examined Measure charging management chip 3 is continuously configured in a short time three times preset output rule, but overvoltage protection chip 2 still from After dynamic circuit breaker opens the connection of charging management chip 3 and charging port 1, the 4th default output is being carried out to charging management chip 3 When the configuration of rule, the initial value size of the charging current of output can be reduced, momentary charge electric current is reduced to reach, to reduce The purpose of charging voltage.In still other embodiments, the kind of the device end of the access of charging port 1 can be also detected and characterized in CPU Class, different when setting terminal access, the first pre-set current value for corresponding to the charging current of output is also different.
As shown in Figure 1, in some embodiments, overvoltage protection chip 2 includes field-effect tube 21, charging port 1 and charging Managing chip 3 is metal-oxide-semiconductor by 21 circuit connection of field-effect tube, the field-effect tube 21, and metal-oxide-semiconductor decides whether according to charging voltage Disconnect the circuit connection between charging port 1 and charging management chip 3.Compared to using bipolar transistor, using metal-oxide-semiconductor, Fast response time, and more energy saving.
As shown in Fig. 2, in some embodiments, electricity of also having connected between charging port 1 and overvoltage protection chip 2 Resistance 4.The resistance value of the resistance 4 is smaller, generally 10-20m Ω, and the resistance 4 is increased in charging circuit, can be effectively reduced The instantaneous variation amount of charging current plays a buffer function, so that preferably reaching reduces momentary charge electric current, to reduce Charging voltage, the purpose for being normally carried out charging.
The invention proposes a kind of over-pressure safety devices, including CPU, charging port 1, overvoltage protection chip 2 and charging valve It manages chip 3, charging port 1 and charging management chip 3 and passes through 2 circuit connection of overvoltage protection chip, CPU and charging management chip 3 Circuit connection；Charging management chip 3 reaches charging end through overvoltage protection chip 2 for controlling output charging current, charging current Mouth 1, charging port 1 is connect with device end, and for giving device end to input charging current, overvoltage protection chip 2 is for detecting The charging voltage of charging port 1, and decide whether to disconnect between charging port 1 and charging management chip 3 according to charging voltage Circuit connection, CPU be used for adjust charging current size and increase rate.When overvoltage protection chip 2 starts charging valve automatically When managing the connection of chip 3 and charging port 1, charging current is controlled by CPU and was exported before this with a lesser initial value, then Normal value size is incrementally increased according to certain increase rate during output, by reducing the big of momentary charge electric current It is small, solve the company for causing overvoltage protection chip 2 to disconnect charging management chip 3 and charging port 1 automatically because charging voltage is excessively high It connects and causes the problem of can not charging normal.Simple structure is arranged in device, detects and controls operation automatically by CPU progress, conceives It is ingenious, it is simple and convenient.
As shown in figure 3, applied on above-mentioned over-pressure safety device the invention also provides a kind of over-voltage protection method, Include:
S1: judge whether the charging current of charging management chip output from the first pre-set current value sports zero, wherein the One pre-set current value is the normal output current value of charging current；
S2: if sporting zero, whether real-time detection overvoltage protection chip is on connection status；
S3: if overvoltage protection chip is on connection status, charging management chip is controlled according to the first default output Rule output charging current, until charging current reverts to the first pre-set current value；Wherein, the first default output rule is setting The initial value of charging current is the second pre-set current value, and increases charging electricity according to the first default rate that increases during output Stream, the second pre-set current value is less than the first pre-set current value.
Whether from the first pre-set current value zero is sported in the above-mentioned charging current for judging charging management chip output, In, the first pre-set current value is in the step S1 for export the normal value of charging current, and the first pre-set current value is charging current Normal output current value, that is, when charging normal, the size of the charging current of charging management chip output is the first pre-set current value, Export simultaneously examinations by CPU control charging management chip.In some embodiments, the equipment accessed according to charging port The difference of the type of terminal, corresponding first pre-set current value are also different.User is provided in overvoltage protection chip in advance Maximum voltage threshold, the MOS when the charging voltage for detecting charging port reaches maximum voltage threshold, in overvoltage protection chip Field-effect tube will disconnect automatically, disconnect the circuit connection between charging management chip and charging port, and CPU is just at this time Detect that charging current sports zero from the first current value, i.e. external charger stopping charges to device end.
If sporting zero above-mentioned, whether real-time detection overvoltage protection chip is on the step S2 of connection status In, CPU detects that charging current sports zero from the first pre-set current value, i.e. device end is filled in external charger stopping After electricity, CPU judges whether to meet output condition, defeated according to the first default output rule progress to control charging management chip Out.In some embodiments, by field-effect tube circuit connection, which is MOS for charging port and charging management chip Pipe, when metal-oxide-semiconductor is in the conductive state, when charging management chip is linked together with charging port, i.e. charging management chip energy Enough output charging current arrive charging port when, i.e., judgement meet output condition, can charge to device end.
If being on connection status in above-mentioned overvoltage protection chip, control charging management chip preset according to first it is defeated Rule output charging current out, until in the step S3 that charging current reverts to the first pre-set current value, MOS charging port with After charging manager links together, CPU, which is detected, meets output condition, i.e., charging current can be conveyed from charging management chip When to charging port, CPU controls the default output rule output charging current of charging management chip first.First default output rule It is preset in advance, wherein the normal value for containing charging current output is the first pre-set current value, initial value is second default Current value and during output charging current according to first it is default increase rate and increase from the second pre-set current value increase to The setting informations such as the first pre-set current value.Why second pre-set current value controls Charge Management less than the first pre-set current value The size of the charging current initial value of chip output is lesser second pre-set current value, rather than is directly output as first The normal value of pre-set current value is wink when overvoltage protection chip connect charging port with charging management chip in order to prevent Between charging current it is excessive, cause momentary charging voltage excessively high, thus overvoltage protection chip the problem of disconnecting automatically again. According to the first default output rule, the size that CPU controls the charging current initial value of charging management chip output is second default Current value, the second pre-set current value is less than the first pre-set current value, then during output, according to the first default increase rate Increase to the first pre-set current value from the second pre-set current value, i.e., by control charging current first export one it is lesser initial Then value incrementally increases to the normal value of charging current according to the first increase rate, solves because momentary charge electric current is excessive, lead Cause is shaken, so that charging voltage is too high to the problem of charging normal.Such as the normal value of the charging current of output is First pre-set current value 500mA, after automatic starting connection, the initial value for controlling the charging current of output is the second pre-set current value 50mA, during output, charging current according to first it is default increase rate from the second pre-set current value 50mA incrementally increase to First pre-set current value 500mA.In some embodiments, the first default rate that increases is set as every 10ms increase 50mA, that is, fills The increase rate that electric current is according to 50mA, 100mA, 150mA ... incrementally increases default to first from the second pre-set current value 50mA Current value 500mA is finally persistently exported according to the first pre-set current value, is charged normal.In some embodiments, charging port with When being connected for the first time between charging management chip, and output rule is preset according to first and is exported.
As shown in figure 4, judging whether the charging current of charging management chip output sports from the first pre-set current value Before zero step S1, comprising:
S01: device end access is judged whether there is；
S02: if there is device end access, charging management chip is controlled with the first pre-set current value and exports charging current.
In the above-mentioned step S01 for judging whether there is device end access, whether CPU real-time detection charging port has equipment Terminal access exports charging current to control charging management chip according to the first pre-set current value.
If having device end access above-mentioned, charging management chip is controlled with the first pre-set current value and exports charging current Step S02 in, if charging port has a device end access, can be arrived by CPU real-time detection, then CPU controls Charge Management core The size of the charging current of piece output is the first pre-set current value, and is exported, and is charged to device end.In some embodiments In, CPU also can read the information of the device end of access and be distinguished, then not according to the device end type of access Together, the first different pre-set current values is set, and controls charging management chip and is exported.Such as detect that the equipment of access is whole End belongs to fast fill device, then corresponding first pre-set current value being arranged will be bigger, is convenient for fast charge.
In some embodiments, if there is device end access, it is defeated with the first pre-set current value to control charging management chip The step S02 of charging current out, comprising:
S021: if there is device end access, the facility information of device end is read；
S022: the size of the first pre-set current value is determined according to facility information；
S023: control charging management chip exports charging current with the first pre-set current value.
If having device end access above-mentioned, read in the step S021 of the facility information of device end, if charging end Mouth has device end access, can be arrived by CPU real-time detection, and then CPU reads the facility information of the device end of access, with determination What is accessed is the equipment of which kind of type.Such as mobile phone, computer, smartwatch etc..
In the step S022 of the above-mentioned size for determining the first pre-set current value according to facility information, the equipment that reads access The facility information of terminal after the type for determining equipment, determines the first pre-set current value for needing to export according to facility information Size, such as detect that the device end of access belongs to fast fill device, then corresponding first pre-set current value being arranged will compare It is larger, it is convenient for fast charge.
In above-mentioned control charging management chip in the step S023 of the first pre-set current value output charging current, it is determined that After the size of first pre-set current value, CPU controls charging management chip and exports charging current with the first pre-set current value, to setting Standby terminal charges.
In some embodiments, if sporting zero, whether real-time detection overvoltage protection chip is on connection status Step S2, comprising:
S21: if sporting zero, whether real-time detection field-effect tube is on connection status.
If sporting zero above-mentioned, whether real-time detection field-effect tube is in the step S21 of connection status, After CPU detects that charging current sports zero from the first pre-set current value, CPU judge overvoltage protection chip whether the company of being on State is connect, is exported to control charging management chip according to the first default output rule.In some embodiments, over-voltage is protected Shield chip includes field-effect tube, charging port and charging management chip by field-effect tube circuit connection, which is MOS Pipe, when metal-oxide-semiconductor is in the conductive state, links together charging management chip and charging port, charging management chip can Charging current is exported to charging port.Judging field-effect tube, whether it is in a conductive state, is whether to judge overvoltage protection chip It is on connection status, is to judge whether charging current can be output to charging port from charging management chip, to equipment Terminal charges.
As shown in figure 5, in some embodiments, if overvoltage protection chip is on connection status, controlling charging valve Chip is managed according to the first default output rule output charging current, until the step of charging current reverts to the first pre-set current value S3, comprising:
S31: judge whether charging current during increase sports zero again；
S32: if sporting zero again, whether real-time detection overvoltage protection chip is on connection status；
S33: if overvoltage protection chip is on connection status, charging management chip is controlled according to the second default output Rule output charging current, until charging current reverts to the first pre-set current value；Wherein, the second default output rule is setting The initial value of charging current is third pre-set current value, and increases charging electricity according to the second default rate that increases during output Stream, third pre-set current value are less than or equal to the second pre-set current value, and the second default increase rate is default less than first to increase speed Rate.
It is above-mentioned whether judge charging current in increase during sport zero again step S31 in, in Charge Management During chip incrementally increases charging current according to the first default output rule, again whether CPU real-time detection charging current Zero is sported, if CPU detects that charging current sports zero again, i.e. overvoltage protection chip is disconnected Charge Management automatically again The connection of chip and charging port shows that the instant value of the charging current of output is still excessive, causes charging voltage excessively high, can not It is charged normal.
If sporting zero again above-mentioned, the step of whether real-time detection overvoltage protection chip is on connection status In S32, CPU detects that charging current sports zero, i.e. external charging during increasing according to the first default output rule After device stopping charges to device end, CPU judges whether to meet output condition, to control charging management chip according to the Two default output rules are exported.In some embodiments, charging port and charging management chip pass through field-effect tube circuit Connection, which is metal-oxide-semiconductor, and when metal-oxide-semiconductor is in the conductive state, charging management chip and charging port are linked together When, i.e., when charging management chip can export charging current to charging port, that is, determine to meet output condition, it can be to equipment end It charges at end.
If being on connection status in above-mentioned overvoltage protection chip, control charging management chip preset according to second it is defeated Rule output charging current out, until in the step S33 that charging current reverts to the first pre-set current value, if CPU was detected Pressure protection chip is on connection status, when overvoltage protection chip starts the connection of charging management chip and charging port automatically When, for CPU according to the second default output rule, it is that third is pre- that the charging current initial value of control charging management chip output, which is size, If current value, third pre-set current value is less than or equal to the second pre-set current value, why controls charging management chip output The size of charging current initial value is a lesser third pre-set current value, rather than is directly output as the first pre-set current value Normal value, be momentary charge electric current when overvoltage protection chip connect charging port with charging management chip in order to prevent It is excessive, cause momentary charging voltage excessively high, thus the problem of overvoltage protection chip disconnects automatically again.Then it is exporting In the process, the first pre-set current value, the second default increase are increased to from third pre-set current value according to the second default increase rate Rate is default less than first to increase rate, i.e., first exports a lesser initial value by controlling charging current, then according to the Two increase rates increase to the first pre-set current value from third pre-set current value, and setting second is default to increase rate in advance less than first If the purpose for increasing rate be because according to first it is default increase rate output charging current during, overvoltage protection chip It is disconnected the connection of charging management chip and charging port automatically again, that is, shows to carry out according to the first default increase rate defeated Out, momentary charge electric current is still excessive, causes charging voltage excessively high, leads to not charge normal, therefore it is defeated to reduce charging current Increase rate when out solves to lead to overvoltage protection core because charging voltage is excessively high by reducing the size of momentary charge electric current Piece disconnects the problem of connection of charging management chip and charging port automatically.Such as the normal value of the charging current of output is first Pre-set current value 500mA, after automatic starting connection, the initial value for controlling the charging current of output is third pre-set current value 50mA, during output, charging current according to second it is default increase rate from the second pre-set current value 50mA incrementally increase to First pre-set current value 500mA.In some embodiments, the second default rate that increases is set as every 10ms increase 25mA, that is, fills The increase rate that electric current is according to 50mA, 75mA, 100mA ... is incrementally increased from third pre-set current value 50mA to the first default electricity Flow valuve 500mA is finally persistently exported according to the first pre-set current value, is charged normal.In some embodiments, CPU control charging After managing chip is exported according to default setting, control information record will do it, record information includes that control is which kind of is default The time etc. of output rule and upper secondary control carries out presetting output next time to carry out inquiry and to record according to the control information The control of rule.After if third pre-set current value increases to the first pre-set current value according to the second default increase rate, without again Secondary to sport zero from the first pre-set current value, i.e. overvoltage protection chip is not turned off between charging port and charging management chip Connection shows that charging voltage is lower than maximum voltage threshold at this time, meets the requirement charged normal, just according to the first pre-set current value It carries out continuing output, charge to device end.In CPU according to the second default output rule control charging management chip output charging During electric current, still persistently whether monitoring charging current can sport zero, if monitoring to sport zero, and distance again The last time time interval of default output rule configuration is very short, then again to charging management chip configure one it is different preset it is defeated It is regular out, until meeting the requirement charged normal.In some embodiments, if detecting the last default output rule of distance The time interval then controlled is greater than 10 minutes, then default output rule control this time is identical as last holding, such as on Primary default output rule control is the first default output rule, and this time also control is the first default output rule；If detection To the last default output rule control of distance time interval less than 10 minutes, then default output rule control this time with It is last different, such as last default output rule control is the first default output rule, this time then control is pre- for second If output rule.The reason of being arranged in this way is the time interval very little because if default output rule controls different twice Words then show that last default output rule control is probably undesirable, cause overvoltage protection chip automatic again The connection between charging port and charging management chip is disconnected, which kind of default output rule of control are determined by setting interval Then, can be as fast as possible find satisfactory default output rule, achieve the purpose that restore to charge normal.
In some embodiments, judge the charging current of charging management chip output whether from the first predetermined current value mutation Before the step S1 for being zero, comprising:
S03: judge whether in output Setting pattern；
S04: if so, receive the output setting information of input, output setting information include to the second pre-set current value and The first default setting for increasing rate；
S05: according to output setting information, the default output rule of configuration first.
In the above-mentioned step S03 for judging whether in output Setting pattern, in the case where exporting Setting pattern, user can be into The setting of the default output Rule Informations such as the default output rule of row first, second default output rule, to meet detecting After output condition, CPU can accordingly be exported according to default output rule control charging management chip.
Above-mentioned if so, receiving the output setting information of input, output setting information includes to the second pre-set current value In the step S04 of the first default setting for increasing rate, detect after output Setting pattern, it is defeated that CPU receives user The output setting information entered, wherein output setting information includes the second pre-set current value and first default increase rate etc..
Above-mentioned according to output setting information, configuration first is default to be exported in regular step S05, and it is defeated that CPU receives user After the output setting information entered, default output rule accordingly is configured by output setting information.Such as charging current is exported Initial value is the second pre-set current value, increase rate is that the first default rate and charging current output normal value of increasing is first Pre-set current value is stored as the first default output rule jointly, and charging current output initial value is third pre-set current value, is increased Big rate is that the second default rate and charging current output normal value of increasing is that the first pre-set current value is stored as second jointly Default output rule etc., so that after detecting and meeting output condition, CPU can be according to default output rule control Charge Management Chip is accordingly exported.
In in some implementations, if whether real-time detection overvoltage protection chip is on connection shape sporting zero After the step S2 of state, comprising:
S22: if overvoltage protection chip after preset time still in state is disconnected, issue alerting signal.
If issuing alerting signal still in state is disconnected after preset time in above-mentioned overvoltage protection chip In step S22, after the connection that overvoltage protection chip disconnects charging management chip and charging port, if by one section it is default when Between after CPU detect that overvoltage protection chip is still in the state disconnected, explanation may have overvoltage protection chip occur therefore Situations such as barrier or poor charging environment, occurs, then can issue alerting signal, reminds user's charging situation to occur abnormal.Some In embodiment, it is 5 minutes that the preset time, which is arranged, if connecting by detecting that overvoltage protection chip is still in disconnection after five minutes The state connect can then issue alerting signal.
The invention proposes a kind of over-voltage protection methods, comprising: S1: judging the charging current of charging management chip output is It is no to sport zero from the first pre-set current value, wherein the first pre-set current value is the normal output current value of charging current；S2: If sporting zero, whether real-time detection overvoltage protection chip is on connection status；S3: it is led if overvoltage protection chip is in Logical connection status then controls charging management chip according to the first default output rule output charging current, until charging current is extensive It is again the first pre-set current value.A lesser initial value is first exported by controlling charging current, then according to certain increase Rate is incrementally increased to the normal value of charging current, is solved because momentary charge electric current is excessive, is caused to shake, so that charging Overtension and the problem of can not charge normal.
As shown in fig. 6, the invention also provides a kind of overvoltage protective systems, comprising:
First judgment module 10, for judging the charging current of charging management chip output whether from the first pre-set current value Sport zero, wherein the first pre-set current value is the normal value for exporting charging current；
First detection module 20, if whether real-time detection overvoltage protection chip is on connection for sporting zero State；
First output module 30 controls charging management chip if being on connection status for overvoltage protection chip According to the first default output rule output charging current, until charging current reverts to the first pre-set current value.
In above-mentioned first judgment module 10, the first pre-set current value is the normal output current value of charging current, i.e., just Often when charging, the size of the charging current of charging management chip output is the first pre-set current value, controls Charge Management core by CPU Piece export and examinations.In some embodiments, the difference of the type of the device end accessed according to charging port, Corresponding first pre-set current value is also different.User is provided with maximum voltage threshold in overvoltage protection chip in advance, works as detection When reaching maximum voltage threshold to the charging voltage of charging port, the metal-oxide-semiconductor field effect transistor in overvoltage protection chip will be from dynamic circuit breaker Connection is opened, the circuit connection between charging management chip and charging port is disconnected, CPU is detected by charging current from this time One current value sports zero, i.e. external charger stopping charges to device end.
In above-mentioned first detection module 20, CPU detects that charging current sports zero from the first pre-set current value, i.e., outer After charger stopping in portion's charges to device end, CPU judges whether to meet output condition, to control charging management chip It is exported according to the first default output rule.In some embodiments, charging port and charging management chip pass through field-effect Pipe circuit connection, which is metal-oxide-semiconductor, and when metal-oxide-semiconductor is in the conductive state, charging management chip is connect with charging port When together, i.e., when charging management chip can export charging current to charging port, that is, determine to meet output condition, it can be right Device end charges.
In above-mentioned first output module 30, after MOS links together charging port and charging manager, CPU detection To output condition is met, i.e., when charging current can be transported to charging port from charging management chip, CPU controls Charge Management core The default output rule output charging current of piece first.First default output rule is preset in advance, wherein containing charging electricity The normal value of stream output is the first pre-set current value, and initial value is the second pre-set current value and charging current during output Increase according to the first default increase rate from the second pre-set current value and increases to the setting informations such as the first pre-set current value.Second is pre- If current value, less than the first pre-set current value, the size for why controlling the charging current initial value of charging management chip output is One lesser second pre-set current value, rather than be directly output as the normal value of the first pre-set current value is mistake in order to prevent Momentary charge electric current when pressure protection chip connect charging port with charging management chip is excessive, leads to momentary charging voltage It is excessively high, thus the problem of overvoltage protection chip disconnects automatically again.According to the first default output rule, CPU control is filled The size of the charging current initial value of electric managing chip output is the second pre-set current value, and the second pre-set current value is pre- less than first If current value, then during output, first is increased to from the second pre-set current value according to the first default increase rate and is preset Current value first exports a lesser initial value by controlling charging current, then incrementally increase according to the first increase rate It to the normal value of charging current, solves because momentary charge electric current is excessive, causes to shake, so that charging voltage is excessively high and nothing The problem of method charges normal.Such as the normal value of the charging current of output is the first pre-set current value 500mA, automatic starting connection Afterwards, the initial value for controlling the charging current of output is the second pre-set current value 50mA, and during output, charging current is according to the The one default rate that increases is incrementally increased from the second pre-set current value 50mA to the first pre-set current value 500mA.In some embodiments In, the first default rate that increases is set as every 10ms increase 50mA, i.e., the increasing that charging current is according to 50mA, 100mA, 150mA ... Big rate is incrementally increased from the second pre-set current value 50mA to the first pre-set current value 500mA, finally according to the first predetermined current The lasting output of value, charges normal.In some embodiments, when being connected for the first time between charging port and charging management chip, and It is exported according to the first default output rule.
As shown in fig. 7, in some embodiments, comprising:
Second judgment module 40, for judging whether there is device end access；
Second output module 50, if controlling charging management chip for there is device end access with the first predetermined current Value output charging current.
In above-mentioned second judgment module 40, whether CPU real-time detection charging port has device end access, to control Charging management chip exports charging current according to the first pre-set current value.
In above-mentioned second output module 50, if charging port has device end access, it can be arrived by CPU real-time detection, so The size that CPU controls the charging current of charging management chip output afterwards is the first pre-set current value, and is exported, to equipment end End charging.In some embodiments, CPU also can read the information of the device end of access and be distinguished, then according to access Device end type difference, the first different pre-set current values is set, and controls charging management chip and exported.Such as Detect that the device end of access belongs to fast fill device, then corresponding first pre-set current value being arranged will be bigger, is convenient for Carry out fast charge.
As shown in figure 8, in some embodiments, the second output module 50 includes:
Read module 501, if reading the facility information of device end for there is device end access；
Determining module 502, for determining the size of the first pre-set current value according to facility information；
Third output module 503 exports charging current for controlling charging management chip with the first pre-set current value.
In above-mentioned read module 501, if charging port has device end access, it can be arrived by CPU real-time detection, then CPU reads the facility information of the device end of access, to determine that is accessed is the equipment of which kind of type.Such as mobile phone, computer, intelligence Energy wrist-watch etc..
In above-mentioned determining module 502, the facility information of the device end of access is read, after the type for determining equipment, The size for needing the first pre-set current value exported is determined according to facility information, such as detects that the device end of access belongs to fastly Fill device, then corresponding first pre-set current value being arranged will be bigger, is convenient for fast charge.
In above-mentioned third output module 503, it is determined that after the size of the first pre-set current value, CPU controls charging valve It manages chip and charging current is exported with the first pre-set current value, charge to device end.
As shown in figure 9, in some embodiments, first detection module 20, comprising:
Detection unit 201, if whether real-time detection field-effect tube is on connection status for sporting zero.
In above-mentioned detection unit 201, after CPU detects that charging current sports zero from the first pre-set current value, CPU sentences Whether disconnected overvoltage protection chip is on connection status, so as to control charging management chip according to the first default output rule into Row output.In some embodiments, overvoltage protection chip includes that field-effect tube, charging port and charging management chip are imitated by field Should pipe circuit connection, the field-effect tube be metal-oxide-semiconductor, when metal-oxide-semiconductor is in the conductive state, charging management chip and charging port It links together, charging management chip can export charging current to charging port.Judge whether field-effect tube is on shape State is to judge whether overvoltage protection chip is on connection status, is to judge whether charging current can be from charging valve Reason chip is output to charging port, charges to device end.
As shown in Figure 10, in some embodiments, comprising:
Third judgment module 60, for judging whether charging current during increase sports zero again；
Second detection module 70, if whether real-time detection overvoltage protection chip is on for sporting zero again Connection status；
4th output module 80 controls charging management chip if being on connection status for overvoltage protection chip According to the second default output rule output charging current, until charging current reverts to the first pre-set current value.
In above-mentioned third judgment module 60, charging is incrementally increased according to the first default output rule in charging management chip During electric current, whether CPU real-time detection charging current sports zero again, if CPU detects that charging current is mutated again It is zero, i.e. the overvoltage protection chip connection that is disconnected charging management chip and charging port automatically again shows the charging of output The instant value of electric current is still excessive, causes charging voltage excessively high, can not be charged normal.
In above-mentioned second detection module 70, CPU detects charging current according to the first default output rule increase Sporting zero in the process, i.e., after external charger stopping charges to device end, CPU judges whether to meet output condition, It is exported to control charging management chip according to the second default output rule.In some embodiments, it charging port and fills Electric managing chip is by field-effect tube circuit connection, which is metal-oxide-semiconductor, when metal-oxide-semiconductor is in the conductive state, charging valve Reason chip and charging port be when linking together, i.e., when charging management chip can export charging current to charging port, that is, sentences Surely meet output condition, can charge to device end.
In above-mentioned 4th output module 80, if CPU detects that overvoltage protection chip is on connection status, work as over-voltage When protection chip starts the connection of charging management chip and charging port automatically, CPU is filled according to the second default output rule, control It is third pre-set current value that the charging current initial value of electric managing chip output, which is size, and third pre-set current value is less than or equal to Second pre-set current value, why controlling the size of the charging current initial value of charging management chip output is one lesser the Three pre-set current values, rather than be directly output as the normal value of the first pre-set current value are overvoltage protection chip handles in order to prevent Momentary charge electric current when charging port is connect with charging management chip is excessive, causes momentary charging voltage excessively high, thus mistake The problem of pressure protection chip disconnects automatically again.Then during output, according to the second default rate that increases from the Three pre-set current values increase to the first pre-set current value, the second default rate that increases passes through less than the first default increase rate Control charging current first exports a lesser initial value, then increases to according to the second increase rate from third pre-set current value First pre-set current value, the default increase rate of setting second are because according to first less than the first default purpose for increasing rate During default increase rate output charging current, overvoltage protection chip is disconnected charging management chip and charging automatically again The connection of port shows to be exported according to the first default rate that increases, momentary charge electric current is still excessive, leads to charging electricity Height is pressed through, leads to not charge normal, therefore reduces increase rate when charging current output, by reducing momentary charge electric current Size, solve to cause overvoltage protection chip to disconnect the company of charging management chip and charging port automatically because charging voltage is excessively high The problem of connecing.Such as the normal value of the charging current of output is the first pre-set current value 500mA, and after automatic starting connection, control The initial value of the charging current of output is third pre-set current value 50mA, and during output, charging current is default according to second Increase rate to incrementally increase from the second pre-set current value 50mA to the first pre-set current value 500mA.In some embodiments, second It is default increase rate and be set as every 10ms increase 25mA, i.e., the increase rate that charging current is according to 50mA, 75mA, 100mA ... from Third pre-set current value 50mA is incrementally increased to the first pre-set current value 500mA, is finally continued according to the first pre-set current value defeated Out, it charges normal.After CPU controls charging management chip according to default setting output, control information record, record letter will do it Breath includes the time etc. that control is which kind of default output rule and upper secondary control, to carry out inquiry and according to the control information Record carries out the control for presetting output rule next time.If third pre-set current value increases to the according to the second default rate that increases After one pre-set current value, zero is not sported from the first pre-set current value again, i.e. overvoltage protection chip is not turned off charging end Connection mouthful between charging management chip, shows that charging voltage is lower than maximum voltage threshold at this time, meets wanting of charging normal It asks, just carries out continuing output according to the first pre-set current value, charge to device end.In CPU according to the second default output rule During controlling charging management chip output charging current, still persistently whether monitoring charging current can sport zero, if It monitors to sport zero again, and the time interval apart from last default output rule configuration is very short, then gives charging valve again It manages chip and configures a different default output rule, until meeting the requirement charged normal.In some embodiments, if Detect that the time interval of the last default output rule control of distance is greater than 10 minutes, then default output rule control this time System is identical as last holding, such as last default output rule control is the first default output rule, is this time also controlled For the first default output rule；If detecting apart from the last default time interval for exporting rule control less than 10 minutes, Default output rule control this time is different from the last time, such as last default output rule control is the first default output Rule, this time then control is the second default output rule.The reason of being arranged in this way is because if different twice presetting is defeated Out if the time interval very little of rule control, then shows that last default output rule control is not met probably and want It asks, causes overvoltage protection chip to disconnect the connection between charging port and charging management chip automatically again, by the way that the time is arranged Interval determines which kind of default output rule of control, can be as fast as possible to find satisfactory default output regular, reach Restore the purpose charged normal.
As shown in figure 11, in some embodiments, comprising:
4th judgment module 90, for judging whether in output Setting pattern；
Receiving module 100, for if so, receiving the output setting information of input, output setting information to include to second Pre-set current value and the first default setting for increasing rate；
Configuration module 110, for according to output setting information, the default output rule of configuration first.
In above-mentioned 4th judgment module 90, in the case where exporting Setting pattern, user can carry out the first default output rule, The setting of the default output Rule Informations such as second default output rule, so that after detecting and meeting output condition, CPU can root It is accordingly exported according to default output rule control charging management chip.
In above-mentioned receiving module 100, detect after output Setting pattern, CPU receives the output of user's input Setting information, wherein output setting information includes the second pre-set current value and first default increase rate etc..
In above-mentioned configuration module 110, after CPU receives the output setting information of user's input, output setting information is matched It is set to corresponding default output rule.Such as by charging current output initial value be the second pre-set current value, to increase rate be the One default increase rate and charging current output normal value are stored as the first default output for the first pre-set current value jointly and advise Then, be third pre-set current value by charging current output initial value, increase rate is the second default increase rate and charging electricity Stream output normal value is that the first pre-set current value is stored as second default output rule etc. jointly, to meet output detecting After condition, CPU can accordingly be exported according to default output rule control charging management chip.
As shown in figure 12, in some embodiments, comprising:
Reminding module 120, if being issued after preset time still in state is disconnected for overvoltage protection chip Alerting signal.
In above-mentioned reminding module 120, overvoltage protection chip disconnect charging management chip and charging port connection it Afterwards, if CPU detects that overvoltage protection chip is still in the state disconnected after one section of preset time, explanation may have Overvoltage protection chip break down or charge environment it is poor situations such as generation, then can issue alerting signal, remind user's charging Situation occurs abnormal.In some embodiments, it is 5 minutes that the preset time, which is arranged, if by detecting overvoltage protection after five minutes Chip is still in the state disconnected, then can issue alerting signal.
The invention proposes a kind of overvoltage protective systems, comprising: first judgment module 10, for judging charging management chip Whether the charging current of output from the first pre-set current value sports zero, wherein the first pre-set current value is output charging current Normal value；First detection module 20, if whether real-time detection overvoltage protection chip is on connection for sporting zero State；First output module 30, if being on connection status for overvoltage protection chip, control charging management chip according to First default output rule output charging current, until charging current reverts to the first pre-set current value.Pass through control charging electricity Stream first exports a lesser initial value, then incrementally increases according to certain increase rate to the normal value of charging current, solution It has determined because momentary charge electric current is excessive, has caused to shake, so that charging voltage is too high to the problem of charging normal.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all utilizations Equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content is applied directly or indirectly in other correlations Technical field, be included within the scope of the present invention.

Claims (10)

1. a kind of over-pressure safety device, which is characterized in that including CPU, charging port, overvoltage protection chip and Charge Management core Piece, the charging port and the charging management chip are electrically connected by the overvoltage protection chip, the CPU and the charging Managing chip electrical connection；The charging management chip is for exporting charging current, and the charging current is through the overvoltage protection core Piece is exported to the charging port, and the charging port is connect with device end, for filling to described in device end input Electric current；The overvoltage protection chip is used to detect the charging voltage of the charging port, and the overvoltage protection chip is described Charging voltage disconnects the electrical connection between the charging port and the charging management chip when being greater than predetermined voltage threshold, and works as When the charging voltage is less than the predetermined voltage threshold, it is again coupled to the charging port and the Charge Management core disconnected Piece, the CPU are used for when the charging port and the charging management chip are again coupled to, and reduce the first of the charging current Initial value increases rate with its is controlled.
2. over-pressure safety device according to claim 1, which is characterized in that in the charging port and the overvoltage protection It has also connected between chip a resistance.
3. a kind of over-voltage protection method, using on over-pressure safety device described in claim 1 characterized by comprising
Judge whether the charging current of charging management chip output from the first pre-set current value sports zero, wherein First pre-set current value is the normal value for exporting the charging current；
If sporting zero, whether overvoltage protection chip described in real-time detection is on connection status；
If the overvoltage protection chip is in the conducting connection status, it is default according to first to control the charging management chip Output rule exports the charging current, until the charging current reverts to first pre-set current value；Wherein, described One default output rule is that the initial value of the charging current is arranged is the second pre-set current value, and according to the during output The one default rate that increases increases the charging current, and second pre-set current value is less than first pre-set current value.
4. over-voltage protection method according to claim 3, which is characterized in that defeated in the judgement charging management chip Before the step of whether charging current out sports zero from the first pre-set current value, comprising:
Judge whether there is the device end access；
If there is the device end to access, the charging management chip is controlled to fill described in first pre-set current value output Electric current.
5. over-voltage protection method according to claim 4, which is characterized in that if described have the device end to access, Control the step of charging management chip exports the charging current with first pre-set current value, comprising:
If there is the device end to access, the facility information of the device end is read；
The size of first pre-set current value is determined according to the facility information；
It controls the charging management chip and the charging current is exported with first pre-set current value.
6. over-voltage protection method according to claim 3, which is characterized in that led if the overvoltage protection chip is in Logical connection status then controls the charging management chip according to the first default output setting and exports the charging current, Zhi Daosuo After stating the step of charging current reverts to first pre-set current value, comprising:
Judge whether the charging current during increase sports zero again；
If sporting zero again, whether overvoltage protection chip described in real-time detection is in the conducting connection status；
If the overvoltage protection chip is in the conducting connection status, it is default according to second to control the charging management chip Output setting exports the charging current, until the charging current reverts to first pre-set current value；Wherein, described The initial value that two default outputs are set as that the charging current is arranged is third pre-set current value, and according to the during output The two default rates that increase increase the charging current, and the third pre-set current value is less than or equal to second predetermined current Value, the described second default increase rate is default less than described first to increase rate.
7. over-voltage protection method according to claim 3, which is characterized in that the judgement charging management chip output Charging current the step of whether sporting zero from the first pre-set current value before, comprising:
Judge whether in output Setting pattern；
If so, receive input output setting information, the output setting information include to second pre-set current value with The described first default setting for increasing rate；
According to the output setting information, the described first default output setting is configured.
8. a kind of overvoltage protective system, using on over-pressure safety device described in claim 1 characterized by comprising
Whether first judgment module, the charging current for judging the charging management chip output are default from described first Current value sports zero, wherein first pre-set current value is the normal value for exporting the charging current；
First detection module, if whether overvoltage protection chip described in real-time detection, which is in the conducting, connects for sporting zero Connect state；
First output module controls the charging valve if being in the conducting connection status for the overvoltage protection chip It manages chip and exports the charging current according to the described first default output setting, until the charging current reverts to described first Pre-set current value；Wherein, the initial value that the described first default output is set as that the charging current is arranged is the second predetermined current Value, and increase the charging current according to the first default rate that increases during output, second pre-set current value is less than First pre-set current value.
9. overvoltage protective system according to claim 8, which is characterized in that further include:
Read module, if reading the facility information of the device end for there is the device end to access；
Determining module, for determining the size of first pre-set current value according to the facility information；
Third output module exports the charging electricity for controlling the charging management chip with first pre-set current value Stream.
10. overvoltage protective system according to claim 8, which is characterized in that further include:
Third judgment module, for judging whether the charging current during increase sports zero again；
Second detection module, if whether overvoltage protection chip described in real-time detection, which is in described, is led for sporting zero again Logical connection status；
4th output module controls the charging valve if being in the conducting connection status for the overvoltage protection chip It manages chip and exports the charging current according to the described second default output setting, until the charging current reverts to described first Pre-set current value；Wherein, the initial value that the described second default output is set as that the charging current is arranged is third predetermined current Value, and increase the charging current according to the second default rate that increases during output, the third pre-set current value is less than Or it is equal to second pre-set current value, the described second default increase rate is default less than described first to increase rate.
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