The content of the invention
It is an object of the invention to provide a kind of Intelligent switching circuit for pre-installing battery system, it is intended to solves traditional prepackage
The problem of cost of parts height existing for the load switching circuit of battery system and big battery power consumption.
A kind of Intelligent switching circuit for pre-installing battery system, is connected with battery, including：It is connected, uses with the anode
In the first trigger signal of generation and the second trigger signal and the trigger module for receiving control signal；With the anode and described
Trigger module connects, for receiving first trigger signal and exporting the control module of the control signal；And with it is described
Anode, the trigger module connect with workload, are touched for receiving second trigger signal, and according to described second
Signal and the control signal controls the conducting of the earth terminal of the GND and the workload and the mistake disconnected respectively
Discharge prevention module；Wherein, the workload includes the control module.
Further, the over module includes over chip and the first FET, and the mistake is put
The input of electric protection chip is connected with the trigger module, the output end of the over chip and described first effect
Should pipe grid connection, the source electrode of first FET connects the GND, for producing the first triggering letter
Number and second trigger signal the first button, the first end of first button connects the anode；
Further, the trigger module includes：It is connected, uses with the second end of first button and the control module
In the first trigger element for exporting first trigger signal；It is connected with the control module and the over module,
For receiving the second trigger element of the control signal；And connect with first button and the over module
Connect, for exporting the 3rd trigger element of second trigger signal.
Further, first trigger element includes first resistor and second resistance；The first end of the first resistor
The second end of first button is connected, the second end of the first resistor is connected with the first end of the second resistance, described
Described in the public connecting end of the second termination GND of second resistance, the first resistor and the second resistance is used as
The output end of first trigger element is connected with the control module.The drain electrode of first FET connects the workload
Further, second trigger element includes 3rd resistor, the 4th resistance, the first diode and the second field-effect
Pipe；The grid of second FET is connected as the input of second trigger element with the control module, is used for
Receive the control signal, the grounded drain of second FET, the source electrode connection of second FET described the
The first end of three resistance, the second end of the 3rd resistor connect the anode of first diode, first diode
Negative electrode connects the first end of the 4th resistance, and the second end of the 4th resistance connects the anode, the 4th electricity
Output end and the over mould of the public connecting end of resistance and first diode as second trigger element
The input connection of block.
Further, the 3rd trigger element includes the 5th resistance and the second diode；The first of 5th resistance
Hold and be connected as the input of the 3rd trigger element with the second end of first button, for receiving second triggering
Signal, the second end of the 5th resistance connect the anode of second diode, the negative electrode of second diode with it is described
The grid connection of first FET.
Further, in addition to voltage transformation module, the voltage transformation module is connected to the anode and described
Between workload, required voltage during for converting battery voltage to the workload normal work.
Further, the voltage transformation module is DC/DC converters or voltage-stablizer.
Further, the control module is microcontroller.
Another object of the present invention is to provide a kind of intelligent terminal, the intelligent terminal includes battery and above-mentioned prepackage
The Intelligent switching circuit of battery system.
The present invention makes full use of the indispensable circuit resource (over module) of system itself, is triggered by increasing
Module, increased trigger module are made up of the conventional electrical part of low cost, without using by by integrating load switch chip
Load switch with FET composition is the control of combination and disengaging that battery and workload can be achieved, so as to reduce electricity
The consumption of battery static leakage current when road cost and shut-off.
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Referring to Fig. 2, a kind of Intelligent switching circuit of prepackage battery system in presently preferred embodiments of the present invention, described pre-
The Intelligent switching circuit of packed battery system is connected with battery 11, including trigger module 12, control module 13 and over mould
Battery 11 is used to provide electric energy；Trigger module 12 is connected with the positive pole of battery 11, for producing the first trigger signal
With the second trigger signal and receive control signal；Control module 13 is connected with the positive pole and trigger module 12 of battery 11, for connecing
Receive the first trigger signal and output control signal；Over module 14 and the positive pole, trigger module 12 and work of battery 11
The connection of load 100, for receiving the second trigger signal, and according to the negative pole and workload of the second trigger signal control battery 11
100 earth terminal conducting, the negative pole of battery 11 and the earth terminal of workload 100 is controlled to disconnect according to control signal；Wherein, work
Making load 100 includes control module 13.
Referring to Fig. 3, the Intelligent switching circuit of the prepackage battery system also includes voltage transformation module 15, battery 11
Negative pole is grounded, and voltage transformation module 15 is connected between the positive pole of battery 11 and workload 100, for cell voltage to be changed
For 100 normal work of workload when required voltage.Voltage transformation module 15 is DC/DC converters or LDO (low
Dropout regulator) low pressure difference linear voltage regulator.
It is single that trigger module 12 includes the first button K1, the first trigger element 121, the second trigger element 122 and the 3rd triggering
Member 123；First button K1 is used to produce the first trigger signal and the second trigger signal, the first button K1 first end connection battery
11 positive pole；First trigger element 121 is connected with the first button K1 the second end and control module 13, for exporting the first triggering
Signal；Second trigger element 122 is connected with control module 13 and over module 14, for receiving control signal；3rd
Trigger element 123 is connected with the first trigger element 121 and over module 14, for exporting the second trigger signal.
First trigger element 121 includes first resistor R1 and second resistance R2；First resistor R1 first end connection first
Button K1 the second end, first resistor R1 the second end are connected with second resistance R2 first end, second resistance R2 the second end
Connect the negative pole of battery 11, the output end of first resistor R1 and second resistance R2 public connecting end as the first trigger element 121
It is connected with control module 13.
Second trigger element 122 includes 3rd resistor R3, the 4th resistance R4, the first diode D1 and the second FET
Q2, the first diode D1 are voltage-regulator diode；Second FET Q2 grid as the second trigger element 122 input with
Control module 13 connects, for receiving control signal, the second FET Q2 grounded drain, the second FET Q2 source electrode
3rd resistor R3 first end is connected, 3rd resistor R3 the second end connects the first diode D1 anode, the first diode D1
Negative electrode connect the 4th resistance R4 first end, the 4th resistance R4 the second end connection battery 11 positive pole, the 4th resistance R4 and
First diode D1 public connecting end is as the output end of the second trigger element 122 and the input of over module 14
3rd trigger element 123 includes the 5th resistance R5 and the second diode D2；5th resistance R5 first end is as
The input of three trigger elements 123 is connected with the first button K1 the second end, for receiving the second trigger signal, the 5th resistance R5
The second end connect the second diode D2 anode, the second diode D2 negative electrode is connected with the first FET Q1 grid.
Workload 100 includes control module 13, and control module 13 is MCU (MCU：Microcontroller Unit, it is micro-
Over module 14 includes over chip U1 and the first FET Q1, over chip U1
Input be connected with trigger module 12, over chip U1 output end is connected with the first FET Q1 grid,
The negative pole of first FET Q1 source electrode connection battery 11, the first FET Q1 drain electrode connection workload 100 connect
The Intelligent switching circuit of above-mentioned prepackage battery system can be applied in other different occasions, for example, can will be upper
The Intelligent switching circuit for stating prepackage battery system is applied to intelligent terminal, and the intelligent terminal includes battery and above-mentioned pre- packed battery
The Intelligent switching circuit of system.
Illustrate the operation principle of the Intelligent switching circuit of present invention prepackage battery system with reference to Fig. 1 to Fig. 3.Such as figure
Shown in 1, existing load switching circuit generally uses independent integrated load switch chip, by battery and workload
Load switch 200 is added between 100 to achieve the goal, specific control process is：The control that load switch chip passes through button K
Signal is controlled the FET T break-make being internally integrated to realize, so as to realize the knot to battery and rear class workload 100
The control with departing from is closed, the technical scheme that this one kind is widely adopted, both sides shortcoming be present：1) there is higher manufacture zero
Part cost；2) the higher battery electric quantity of consumption is still needed in the system of closing.The purpose of the present invention is exactly to reduce cost, reduce and close
Battery power consumption when disconnected.
As the prepackage battery system of specification, generally with essential battery over-discharge protection module 14, the present invention
It is to rely on based on over module 14, increases a small amount of cheap electronic component, can just reach battery very well
The control purpose with disengaging is combined on demand with rear class workload.
The operation principle of over module 14 is：When battery over-discharge protection chip U1 is detected, cell voltage is low to be arrived
During some magnitude of voltage set in advance, an overdischarge control signal (low level) can be exported to the first FET Q1, in
It is the first FET Q1 shut-offs so that the earth terminal of the negative pole of battery 11 and workload 100 is from electrically departing from.
As shown in figure 3, completing outgoing quality after the assay was approved in equipment, the first button K1, the first button K1 tool are pressed
Body effective time length can freely be defined by control module 13, the positive pole of the first button K1 first end connection battery 11, the
One button K1 the second end connects the negative pole of battery 11, the electricity of first resistor R1 and second by first resistor R1 with second resistance R2
Hinder public connecting end the first trigger signal of output that R2 carries out partial pressure, first resistor R1 and second resistance R2, first triggering
Signal is battery on/off button detection signal, and control module 13 receives the first trigger signal, outputs a control signal to second effect
Should pipe Q2 grid, the control signal is that battery contract fully performs signal, and the control signal is high level, so as to control the
Two FET Q2 are turned on, and the first diode D1,3rd resistor R3 and the 4th resistance R4 is carried out partial pressure, wherein, the one or two pole
Pipe D1 is voltage-regulator diode, and the first diode D1 voltage stabilizing threshold values can be selected according to being actually needed, the first diode D1's
The alternative condition of voltage stabilizing threshold values is：(1) over chip U1 actual Cross prevention voltages set in advance are set as VL, the
One diode D1 voltage stabilizing threshold values is VZ, then should be ensured that VZ is less than VL：(2) 3rd resistor R3 and the 4th resistance R4 series connection phases are set
The total resistance value for adding to obtain is R, then should be ensured that VL subtracts VZ difference DELTA V, divided by after total resistance value R, obtained current value
IL and R product V1 is necessarily less than VL, it is ensured that Cross prevention chip U1 can determine that the electricity of the battery 11 of the simulation for this moment
Pressure, which has been low enough to, needs Cross prevention chip U1 to protect, and then disconnecting circuit, reaches the real mesh for saving the energy of battery 11
's.(3) electric current IL actual value suggestion is no more than 20 milliamperes, avoids immediate current excessive, causes the damage of battery itself.First
After diode D1,3rd resistor R3 and the 4th resistance R4 carry out partial pressure, the first diode D1 and the 4th resistance R4's is commonly connected
End (i.e. the input of over module 14) obtains a low-voltage in accordance with overdischarge semaphore request, makes over
Chip U1 is judged as that cell voltage is relatively low, so as to which starting protection acts, over chip U1 output low level signals
To the first FET Q1, the first FET Q1 shut-off, the earth terminal of the negative pole and workload 100 that obtain battery 11 departs from
Control result.And when battery 11 departs from workload 100, control module 13 exports the high level to the second FET Q2
Signal disappears therewith, the second FET Q2 shut-offs, so as to naturally terminate whole operation process.
When the negative pole of battery 11 and the earth terminal of workload 100 are in disengaged position, the first button K1 can be pressed, is made
The voltage of battery 11 reaches the first FET Q1 grid via the 5th resistance R5 and the second diode D2, so as to produce the
Two trigger signals, turn on the first FET Q1, the negative pole of battery 11 connects with the earth terminal of workload 100, opens system
Unite to obtain electric work.
Wherein, first resistor R1 and second resistance R2 partial pressure acts on, and is applied to the electricity of the I/O ports of control module 13
Flat to control within the level range of safety, protecting the port of control module 13 will not damage because crossing high level.Simultaneously
By reasonable disposition first resistor R1 and second resistance R2 resistance parameter, wherein, first resistor R1 and second resistance R2 resistance
The equipping rules of value parameter are：After (1) first button K1 is pressed, the value that is obtained to the partial pressure of 11 minimum operating voltage of battery will
It is enough to enable the control module 13 of the part of workload 100 to be clearly identified as logic " height " level, can be by control module 13
Reliable recognition：After (2) first button K1 are pressed, the value that is obtained to the partial pressure of the maximum operating voltage of battery 11, it is impossible to more than work
The limit high voltage that the control module 13 of 100 parts can endure is loaded, avoids damaging control module 13 so that work as workload
100 are closed down, and the current potential of first resistor R1 and second resistance R2 public connecting end is in the first FET Q1
Control threshold values under, it is ensured that the first effect pipe Q1 is in normal, effective and good off state.Second diode D2 work
With being：When the systems are operating normally, the low level of the first button K1 and first resistor R1 public connecting end is reversely masked
The first FET Q1 grid will not be output to, it is ensured that the first FET Q1 normallies always.
The present invention makes full use of the indispensable over module 14 of system itself, by increasing by the second FET
Q2,3rd resistor R3, the 4th resistance R4 and the first diode D1 these inexpensive conventional hardwares, it is right by control module 13
First button K1 response, over chip U1 is set to turn off first obtaining the overdischarge low voltage signal of a simulation
FET Q1, the control purpose for making battery 11 depart from workload 100 can be reached；By increasing the 5th resistance R5 and the
The two inexpensive conventional hardwares of two diode D2, by operating the first button K1, started the first FET Q1
Voltage signal and connect battery 11 and workload 100, reach activation system enter work control purpose.
Beneficial effects of the present invention：
(1) cost is low.First resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4 required for the present invention,
The totle drilling cost of the elements such as the 5th resistance R5, the first diode D1, the second diode D2 and the second FET Q2, it is only special
The a quarter of load switch chip cost.
(2) electric current of consumption is smaller, is more beneficial for saving the consumption of battery electric quantity.The present invention is in battery 11 and workload
100 when departing from, it is necessary to the battery current of consumption depends on the second FET Q2, and the second FET Q2 shut-off leakage current
Maximum be only 1 microampere, by contrast, special load switch chip, more each function lists because it is internal be present
Member, current drain is typically at 4 microamperes or so.
(3) pursued for surface structure for succinct miniaturized products, it is possible to achieve open-and-shut structure is set with outward appearance
Meter.Such as first button K1 in addition to open and close equipment, can also be pressed by control module 13 for the first button K1
Time span value judge to do some settings, make the first button K1 there are more multiplexing operation functions, without extra increase
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should be included in the scope of the protection.