CN106655107A - High power lithium battery protector - Google Patents
High power lithium battery protector Download PDFInfo
- Publication number
- CN106655107A CN106655107A CN201710041936.2A CN201710041936A CN106655107A CN 106655107 A CN106655107 A CN 106655107A CN 201710041936 A CN201710041936 A CN 201710041936A CN 106655107 A CN106655107 A CN 106655107A
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- Prior art keywords
- lithium battery
- type triode
- npn type
- voltage
- battery pack
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
Abstract
The invention comprises a high power lithium battery protector comprising a collection unit, a control unit, a driving unit and an execution unit, wherein the collection unit is used for collecting charge and discharge current of a lithium battery pack, a voltage of a single lithium battery in the lithium battery pack and the on-off state of a charger and a load, and outputting the collected data to the control unit; the control unit is used for comparing the collected data with a predetermined threshold, and sending an instruction signal to the driving unit according to a comparison result; the driving unit is used for driving the execution unit to execute an action according to the instruction signal, and the driving unit is provided with at least one discharge driving half-bridge and/or a charge driving half-bridge; and the execution unit is used for executing on-off switch on the lithium battery pack and the single lithium battery. The high power lithium battery protector provided by the invention is low in cost and is easy to manufacture.
Description
Technical field
The invention belongs to li-ion cell protection technical field, is a kind of high-power lithium battery protector specifically.
Background technology
Lithium battery is a class by lithium metal or lithium alloy be negative material, using the battery of non-aqueous electrolytic solution.Lithium electricity
Pond is broadly divided into two classes：Lithium metal battery and lithium ion battery.Wherein, lithium ion battery does not contain the lithium of metallic state, and
It can be charging.
With widely using for the digital product such as product such as mobile phone, notebook computer, lithium ion battery is with excellent performance
It is used widely in this kind of product, and progressively to other product applications development, is becoming the master of lithium battery at present
Miscarriage product.
Lithium battery memory-less effect, thus cycle-index is more, long service life.At the same time, lithium battery there is also
Putting, for example, can not occur overcharging or crossing in defect, and otherwise will greatly damage the service life of lithium battery.
Especially, for high-power lithium battery, the situation will be even more serious.For this reason, it may be necessary to the charge and discharge to lithium battery
Electric process is protected.Existing high-power lithium battery protection, because structure is limited, more using single control judging unit,
Easily there is signal conflict and affect the accuracy for judging, cause protected effect not good.
The content of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of high-power lithium battery protector, control judges accurate
Really, reliability is high.
The purpose of the present invention is achieved through the following technical solutions：
A kind of high-power lithium battery protector, including collecting unit, control unit, driver element, performance element：
The collecting unit is used for the electricity of single lithium battery in charging and discharging currents, the lithium battery pack for gather lithium battery pack
Pressure and the lithium battery pack and charger and the on off operating mode of load, and by the data output for collecting to described control unit；
Described control unit includes under-voltage protection control module, short-circuit protection control module, overcurrent protection control module, mistake
Protection control module is filled, for contrasting according to the data for collecting and predetermined threshold, according to comparing result to the driving
Unit sends command signal；
The driver element is used for according to the command signal, drives the performance element execution action；
The performance element is used to perform the break-make switching to the lithium battery pack and the single lithium battery.
Used as the improvement of above-mentioned technical proposal, the collecting unit includes：
Voltage monitor, for gathering the voltage of the single lithium battery；
Current monitor, for gathering the charging and discharging currents of the lithium battery pack.
Used as the further improvement of above-mentioned technical proposal, the under-voltage protection control module includes under-voltage comparator, under-voltage
Signal generator and under-voltage controller：
The under-voltage comparator is used to compare the detected value of the voltage monitor with brownout threshold；
The under-voltage signal generator produces control level signal according to the comparative result of the under-voltage comparator；
The under-voltage controller includes a NPN type triode, and the base stage of the NPN type triode is by a resistor and institute
The output end connection of under-voltage signal generator is stated, between the base stage and emitter stage of the NPN type triode capacitor is connected with,
The colelctor electrode of the NPN type triode is connected with the driver element.
Used as the further improvement of above-mentioned technical proposal, the short-circuit protection control module includes a NPN type triode, institute
The emitter stage for stating NPN type triode is connected with the negative pole of the lithium battery pack, and the base stage of the NPN type triode passes through an electric capacity
Device is connected with the negative pole of the lithium battery pack, and the colelctor electrode of the NPN type triode is connected with the driver element, the NPN
The base stage of type triode is connected by a resistor with the negative pole of the cell.
Used as the further improvement of above-mentioned technical proposal, the overcurrent protection control module includes excessively stream comparator, excessively stream
Signal generator and stream controller excessively：
The excessively stream comparator is used to compare the detected value of the voltage monitor with excessively stream threshold value；
The over-current signal generator produces control level signal according to the comparative result of the excessively stream comparator；
The stream controller of crossing includes that at least one is used to control the NPN type triode of the driver element.
Used as the further improvement of above-mentioned technical proposal, the protection control module that overcharges includes overcharging comparator, overcharging
Signal generator with overcharge controller：
It is described to overcharge comparator for the detected value of the voltage monitor to be compared with threshold value is overcharged；
The signal generator that overcharges produces control level signal according to the comparative result for overcharging comparator, and will
The control level signal is exported to described and overcharges controller；
The controller that overcharges is used to control the NPN type triode of the driver element including at least one.
Used as the further improvement of above-mentioned technical proposal, the driver element includes that at least one charging drives half-bridge, institute
Stating charging drives half-bridge to include a NPN type triode and a PNP type triode：
The emitter stage of the NPN type triode is connected with the emitter stage of the PNP type triode；
The base stage of the NPN type triode is connected with the emitter stage of the PNP type triode.
Used as the further improvement of above-mentioned technical proposal, the driver element includes that at least one electric discharge drives half-bridge, institute
Stating electric discharge drives half-bridge to include a NPN type triode and a PNP type triode：
The emitter stage of the NPN type triode is connected with the emitter stage of the PNP type triode；
The base stage of the NPN type triode is connected with the emitter stage of the PNP type triode.
Used as the further improvement of above-mentioned technical proposal, the performance element is including at least one charging actuator and at least
One electric discharge actuator：
The charging actuator is used for the charging circuit of lithium battery pack described in on/off and the single lithium battery；
The electric discharge actuator is used for the discharge circuit of lithium battery pack described in on/off and the single lithium battery.
Used as the further improvement of above-mentioned technical proposal, the charging actuator includes multiple charged sides being connected in parallel
Metal-oxide-semiconductor, the grid of the charged side metal-oxide-semiconductor is connected with the driver element, source electrode and the charging of the charged side metal-oxide-semiconductor
The negative pole connection of device, the drain electrode of the charged side metal-oxide-semiconductor is connected with the negative pole of the lithium battery pack.
And/or, the electric discharge actuator includes multiple discharge side metal-oxide-semiconductors being connected in parallel, the grid of the discharge side metal-oxide-semiconductor
Pole is connected with the driver element, and the source electrode of the discharge side metal-oxide-semiconductor is connected with the negative pole of the single lithium battery, the electric discharge
The drain electrode of side metal-oxide-semiconductor is connected with the negative pole of the lithium battery pack.
The invention has the beneficial effects as follows：By arranging collecting unit, control unit, driver element, performance element, control is single
Unit includes the under-voltage protection control module being independently arranged, short-circuit protection control module, overcurrent protection control module, overcharges protection
Control module, controls driver element and drives performance element to realize to lithium battery pack and the break-make of the charge-discharge circuit of cell
Switching, is not in signal conflict and interference, there is provided the high high-power lithium battery protection of a kind of control accuracy of judgement, reliability
Device.
To enable the above objects, features and advantages of the present invention to become apparent, preferred embodiment cited below particularly, and coordinate
Appended accompanying drawing, is described in detail below.
Description of the drawings
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below will be attached to what is used needed for embodiment
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, thus be not construed as it is right
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can be with according to this
A little accompanying drawings obtain other related accompanying drawings.
Fig. 1 is the overall construction drawing of the high-power lithium battery protector that the embodiment of the present invention 1 is provided；
Fig. 2 is the structure chart of the collecting unit of the high-power lithium battery protector that the embodiment of the present invention 1 is provided；
Fig. 3 is the first schematic diagram of the control unit of the high-power lithium battery protector that the embodiment of the present invention 1 is provided；
Fig. 4 is that the connection of the under-voltage protection control module of the high-power lithium battery protector that the embodiment of the present invention 1 is provided is shown
It is intended to；
Fig. 5 is the second schematic diagram of the control unit of the high-power lithium battery protector that the embodiment of the present invention 1 is provided；
Fig. 6 is the 3rd schematic diagram of the control unit of the high-power lithium battery protector that the embodiment of the present invention 1 is provided；
Fig. 7 is the 4th schematic diagram of the control unit of the high-power lithium battery protector that the embodiment of the present invention 1 is provided；
Fig. 8 is the 5th schematic diagram of the control unit of the high-power lithium battery protector that the embodiment of the present invention 1 is provided；
Fig. 9 is the 6th schematic diagram of the control unit of the high-power lithium battery protector that the embodiment of the present invention 1 is provided；
Figure 10 is the 7th schematic diagram of the control unit of the high-power lithium battery protector that the embodiment of the present invention 1 is provided；
Figure 11 is the structure chart that the electric discharge of the high-power lithium battery protector that the embodiment of the present invention 1 is provided drives half-bridge；
Figure 12 is the structure chart of the performance element of the high-power lithium battery protector that the embodiment of the present invention 1 is provided；
Figure 13 is the structure chart of the charging actuator of the high-power lithium battery protector that the embodiment of the present invention 1 is provided；
Figure 14 is the structure chart of the electric discharge actuator of the high-power lithium battery protector that the embodiment of the present invention 1 is provided.
Main element symbol description：
1000- high-power lithium battery protectors, 0100- collecting units, 0110- voltage monitors, 0120- current monitorings
Device, 0200- control units, 0210- under-voltage protection control modules, 0211- under-voltage comparators, 0212- is under-voltage signal generator,
0213- is under-voltage controller, NPN type triode that 0213a- is under-voltage, 0213b- is under-voltage resistor, 0213c- is under-voltage capacitor, 0220-
Short-circuit protection control module, 0221- short circuit NPN type triodes, 0222- short-circuit resistors, 0223- shorted condensers, 0230- mistakes
Stream protection control module, 0231- excessively stream comparators, 0232- over-current signal generators, 0233- crosses stream controller, 0233a- excessively streams
NPN type triode, the NPN type triode of 0233b- excessively streams second, 0240- overcharges protection control module, and 0241- overcharges comparator,
0242- overcharges signal generator, and 0243- overcharges controller, and 0243a- overcharges NPN type triode, 0300- driver elements, 0310-
Charge and drive half-bridge, 0311- charged side NPN type triodes, 0312- charged side PNP type triodes, 0320- electric discharges drive half-bridge,
0321- discharge side NPN type triodes, 0322- discharge side PNP type triodes, 0400- performance elements, 0410- charging actuators,
0411- charged side metal-oxide-semiconductors, 0420- electric discharge actuators, 0421- discharge side metal-oxide-semiconductors.
Specific embodiment
For the ease of understanding the present invention, high-power lithium battery protector is carried out more fully below with reference to relevant drawings
Description.The preferred embodiment of high-power lithium battery protector is given in accompanying drawing.But, high-power lithium battery protector can lead to
Cross many different forms to realize, however it is not limited to embodiment described herein.On the contrary, providing the purpose of these embodiments
It is to make the disclosure to high-power lithium battery protector more thorough comprehensive.
It should be noted that when element is referred to as " being fixed on " another element, it can directly on another element
Or can also there is element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or may be simultaneously present centering elements.Conversely, when element be referred to as " directly existing " another element " on " when,
There is no intermediary element.Term as used herein " vertical ", " level ", "left", "right" and similar statement are
For illustrative purposes.
Unless otherwise defined, all of technology used herein and scientific terminology and the technical field for belonging to the present invention
The implication that technical staff is generally understood that is identical.Herein in the term used in the description of high-power lithium battery protector
It is to describe the purpose of specific embodiment, it is not intended that limit the present invention.Term as used herein " and/or " include one
The arbitrary and all of combination of individual or multiple related Listed Items.
Embodiment 1
Fig. 1 is referred to, high-power lithium battery protector 1000 includes collecting unit 0100, control unit 0200, drives list
Unit 0300, performance element 0400：
Collecting unit 0100 be used to gathering in charging and discharging currents, the lithium battery pack of lithium battery pack the voltage of single lithium battery and
Lithium battery pack and charger and the on off operating mode of load, and by the data output for collecting to control unit 0200；
Control unit 0200 includes under-voltage protection control module 0210, short-circuit protection control module 0220, overcurrent protection control
Molding block 0230, protection control module 0240 is overcharged, for contrasting with predetermined threshold according to the data that collect, according to contrast knot
Fruit sends command signal to driver element 0300；
Driver element 0300 is used for according to command signal, drives the execution action of performance element 0400；
Performance element 0400 is used to perform the break-make switching to lithium battery pack and single lithium battery.
Refer to Fig. 2, it is preferable that collecting unit 0100 includes：
Voltage monitor 0110, for gathering the voltage of single lithium battery；
Current monitor 0120, for gathering the charging and discharging currents of lithium battery pack.
Further preferably, collecting unit 0100 also includes：
Charger monitor 0130, for monitoring the on off operating mode of lithium battery pack and charger；
Load monitor 0140, for detecting the connection status of lithium battery pack and load.
Specifically, needs of the lithium battery pack according to electricity, it is often necessary to by multiple single lithium battery serial or parallel connections
Composition.For this purpose, voltage monitor 0110 is connected to the both positive and negative polarity of each single lithium battery, the electricity to each single lithium battery
Pressure is acquired.
Please refer to Fig. 3, Fig. 4 and Fig. 5, it is preferable that under-voltage protection control module 0210 include under-voltage comparator 0211,
Under-voltage signal generator 0212 and under-voltage controller 0213：
Under-voltage comparator 0211 is used to compare 0110 detected value with brownout threshold；
Under-voltage signal generator 0212 produces control level signal according to the comparative result of under-voltage comparator 0211；
Under-voltage controller 0213 includes under-voltage NPN type triode 0213a, and the base stage of under-voltage NPN type triode 0213a is led to
Cross a under-voltage resistor 0213b to be connected with the output end of under-voltage signal generator 0212, the base of under-voltage NPN type triode 0213a
A under-voltage capacitor 0213c, the colelctor electrode and driver element of under-voltage NPN type triode 0213a are connected between pole and emitter stage
0300 connection.
Refer to Fig. 6, it is preferable that short-circuit protection control module 0220 includes a short-circuit NPN type triode 0221, short circuit
The emitter stage of NPN type triode 0221 is connected with the negative pole of lithium battery pack, and the base stage of short-circuit NPN type triode 0221 is short by one
Road capacitor 0223 is connected with the negative pole of lithium battery pack, and colelctor electrode and the driver element 0300 of short-circuit NPN type triode 0221 connect
Connect, the base stage of short-circuit NPN type triode 0221 is connected by a short-circuit resistor 0222 with the negative pole of cell.
Please refer to Fig. 7 and Fig. 8, it is preferable that overcurrent protection control module 0230 includes excessively stream comparator 0231, excessively stream
Signal generator 0232 and stream controller 0233 excessively：
Excessively stream comparator 0231 is used to compare the detected value of current monitor 0120 with excessively stream threshold value；
Over-current signal generator 0232 produces control level signal according to the comparative result of excessively stream comparator 0231；
Cross stream controller 0233 is used to control excessively stream NPN type triode 0233a of driver element 0300 including at least one.
Preferably, cross stream controller 0233 and be also connected to over-current signal generator 0232 and excessively stream NPN type three including one
NPN type triode 0233b of excessively stream second between pole pipe 0233a.
Please refer to Fig. 9 and Figure 10, it is preferable that overcharging protection control module 0240 includes overcharging comparator 0241, mistake
Fill signal generator 0242：
Comparator 0241 is overcharged for the detected value of voltage monitor 0110 to be compared with threshold value is overcharged；
Overcharge signal generator 0242 and control level signal is produced according to the comparative result for overcharging comparator 0241, and will
Control level signal is exported to overcharging controller 0243；
Overcharge controller 0243 including at least one be used to controlling driver element 0300 overcharge NPN type triode 0243a.
Figure 10 and Figure 11 is please referred to, there is driver element 0,300 at least one charging to drive half-bridge 0310 and/or put
Electric drive half-bridge 0320.Specifically, charge and drive half-bridge 0310, electric discharge to drive the quantity of half-bridge 0320 to depend on high power lithium
The concrete power of battery.
Preferably, electric discharge drives colelctor electrode, the short-circuit NPN type three respectively with under-voltage NPN type triode 0213a of half-bridge 0320
The colelctor electrode of pole pipe 0221, the colelctor electrode connection of excessively stream NPN type triode 0233a.
When the driving half-bridge 0310 that charges is multiple, multiple chargings drive half-bridges 0310 to be connected in parallel, respectively to drive
Several cells of different piece in lithium battery pack.In the same manner, when it is multiple that electric discharge drives half-bridge 0320, multiple electric discharges are driven
Dynamic half-bridge 0320 is connected in parallel, respectively to drive several cells of different piece in lithium battery pack.
Thus, it is only necessary to half-bridge circuit is driven by simple, you can realize the driving to performance element 0400, without the need for adopting
Special driving chip, reduce further the manufacture difficulty and cost of high-power lithium battery protector 1000.
Preferably, charge and drive half-bridge 0310 to include charged side NPN type triode 0311 and charged side PNP type triode
0312：
The emitter stage of charged side NPN type triode 0311 is connected with the emitter stage of charged side PNP type triode 0312；
The base stage of charged side NPN type triode 0311 is connected with the emitter stage of charged side PNP type triode 0312.
Further preferably, the colelctor electrode of NPN type triode 0243a and the base stage of charged side NPN type triode 0311 are overcharged
Connection, the emitter stage for overcharging NPN type triode 0243a is connected with the colelctor electrode of charged side PNP type triode 0312.
Thus, by simple circuit structure, overcharge the achievable protection to overcharging of protection control module 0240 and judge control
System.Preferably, when it is multiple (more than 2) that charging drives half-bridge 0310, multiple chargings drive in parallel between half-bridges 0310 company
Connect.
Preferably, electric discharge drives half-bridge 0320 to include discharge side NPN type triode 0321 and discharge side PNP type triode
0322：
The emitter stage of discharge side NPN type triode 0321 is connected with the emitter stage of discharge side PNP type triode 0322；
The base stage of discharge side NPN type triode 0321 is connected with the emitter stage of discharge side PNP type triode 0322.
Further preferably, the base stage of the colelctor electrode of under-voltage NPN type triode 0213a and discharge side NPN type triode 0321
Connection, the emitter stage of under-voltage NPN type triode 0213a is connected with the colelctor electrode of discharge side PNP type triode 0322.
In the same manner, the colelctor electrode of short-circuit NPN type triode 0221 be connected with the base stage of discharge side NPN type triode 0321,
The emitter stage of short-circuit NPN type triode 0221 is connected with the colelctor electrode of discharge side PNP type triode 0322.
In the same manner, the colelctor electrode of excessively stream NPN type triode 0233a be connected with the base stage of discharge side NPN type triode 0321,
The emitter stage of excessively stream NPN type triode 0233a is connected with the colelctor electrode of discharge side PNP type triode 0322.
Thus, can realize controlling under-voltage, short-circuit, over-current state independent judgment, mutually not by the circuit of simple structure
Conflict is disturbed.
Preferably, when it is multiple (more than 2) that electric discharge drives half-bridge 0320, multiple electric discharges are driven between half-bridge 0320 simultaneously
Connection connection.
Please refer to Figure 12, Figure 13 and Figure 14, it is preferable that performance element 0400 includes at least one charging actuator
0410 and at least one electric discharge actuator 0420：
Charging actuator 0410 is used for the charging circuit of on/off lithium battery pack and single lithium battery；
Electric discharge actuator 0420 is used for the discharge circuit of on/off lithium battery pack and single lithium battery.
Preferably, charging actuator 0410 is multiple, to match the voltage and current status of high-power lithium battery.It is multiple to fill
It is connected in parallel between electric actuator 0410, different cells is corresponded to respectively, further improves high-power lithium battery protector
1000 flexibility.
Preferably, the actuator 0420 that discharges is multiple, to match the voltage and current status of high-power lithium battery.It is multiple to put
It is connected in parallel between electric actuator 0420, different cells is corresponded to respectively, further improves high-power lithium battery protector
1000 flexibility.
Preferably, charging actuator 0410 includes multiple metal-oxide-semiconductor (Metal-Oxide Semiconductor field-effects being connected in parallel
Transistor), that is, charged side metal-oxide-semiconductor 0411.The grid of charged side metal-oxide-semiconductor 0411 is connected with driver element 0300, charged side MOS
The source electrode of pipe 0411 is connected with the negative pole of charger, and the drain electrode of charged side metal-oxide-semiconductor 0411 is connected with the negative pole of lithium battery pack.Enter one
Step is preferred, is connected with diode between the source electrode of charged side metal-oxide-semiconductor 0411 and drain electrode, it is to avoid charged side metal-oxide-semiconductor 0411 is subject to anti-
To the impact of voltage, play a protective role.
Preferably, charged side metal-oxide-semiconductor 0411 is N-channel MOS pipe.The grid of charged side metal-oxide-semiconductor 0411 is respectively by difference
The emitter stage of the resistance of resistance and charged side NPN type triode 0311, the colelctor electrode for overcharging NPN type triode 0243a are connected, and fill
The source electrode of electric side metal-oxide-semiconductor 0411 is connected with the emitter stage for overcharging NPN type triode 0243a.
Further, a regulating resistor is provided between the colelctor electrode and base stage of charged side NPN type triode 0311, during charging, is filled
The colelctor electrode of electric side NPN type triode 0311 is connect with high level, is maintained conducting.Thus, the grid of charged side metal-oxide-semiconductor 0411
There is a voltage difference between source electrode, charged side metal-oxide-semiconductor 0411 is held on, lithium battery pack is charged.
When overcharging, the voltage of the collection of voltage monitor 0110 is higher than charge threshold, overcharges signal generator 0242 to mistake
The base stage for filling NPN type triode 0243a sends high level signal, makes to overcharge NPN type triode 0243a and remains up.Further, fill
Electric side PNP type triode 0312 is turned on, the grid source electric charge quick release of charged side metal-oxide-semiconductor 0411, charged side metal-oxide-semiconductor 0411
Disconnect, charging circuit is cut off without overcharging.
Preferably, the actuator 0420 that discharges includes multiple metal-oxide-semiconductors being connected in parallel, that is, discharge side metal-oxide-semiconductor 0421.Electric discharge
The grid of side metal-oxide-semiconductor 0421 is connected with driver element 0300, and the source electrode of discharge side metal-oxide-semiconductor 0421 connects with the negative pole of single lithium battery
Connect, the drain electrode of discharge side metal-oxide-semiconductor 0421 is connected with the negative pole of lithium battery pack.Further preferably, the source electrode of discharge side metal-oxide-semiconductor 0421
Diode is connected between drain electrode, it is to avoid discharge side metal-oxide-semiconductor 0421 is impacted by backward voltage, plays a protective role.
Preferably, discharge side metal-oxide-semiconductor 0421 is N-channel MOS pipe.The grid of discharge side metal-oxide-semiconductor 0421 respectively with discharge side
The emitter stage of NPN type triode 0321, the emitter stage connection of discharge side PNP type triode 0322, the source of discharge side metal-oxide-semiconductor 0421
Pole and the emitter stage of under-voltage NPN type triode 0213a, emitter stage, the excessively stream NPN type triode of short-circuit NPN type triode 0221
The emitter stage connection of 0233a.
Further, a regulating resistor is provided between the colelctor electrode and base stage of discharge side NPN type triode 0321, during electric discharge, is put
The colelctor electrode of electric side NPN type triode 0321 is connect with high level, is maintained conducting.Thus, the grid of discharge side metal-oxide-semiconductor 0421
There is a voltage difference between source electrode, discharge side metal-oxide-semiconductor 0421 is held on, lithium battery pack is able to be discharged.
When under-voltage (cross and put), the voltage of the collection of voltage monitor 0110 is higher than discharge threshold, under-voltage signal generator
0212 to the base stage of under-voltage NPN type triode 0213a sends high level signal, makes under-voltage NPN type triode 0213a keep connecing
It is logical.Further, discharge side PNP type triode 0322 is turned on, the grid source electric charge quick release of discharge side metal-oxide-semiconductor 0421, electric discharge
Side metal-oxide-semiconductor 0421 disconnects, and discharge circuit cut-out is put without crossing.
When short circuit, the negative pole of cell sends a voltage signal.Voltage signal Jing short-circuit resistors 0222 with it is short
The base stage of short-circuit NPN type triode 0221 is reached after the time delay of road capacitor 0223, makes short-circuit NPN type triode 0221 keep leading
It is logical.Further, discharge side PNP type triode 0322 is turned on, the grid source electric charge quick release of discharge side metal-oxide-semiconductor 0421, electric discharge
Side metal-oxide-semiconductor 0421 disconnects, and discharge circuit is cut off without the infringement that is short-circuited.
Especially, delay time can be adjusted with shorted condenser 0223 by adjusting short-circuit resistor 0222,
Further improve synchronism and sensitivity.
When excessively stream, the electric current of the collection of current monitor 0120 is higher than excessively stream threshold value, and over-current signal generator 0232 is to mistake
Stream NPN type triode 0233a sends level signal, is held on excessively stream NPN type triode 0233a.Further, discharge side PNP
Type triode 0322 is turned on, and the grid source electric charge quick release of discharge side metal-oxide-semiconductor 0421, discharge side metal-oxide-semiconductor 0421 disconnects, makes
Discharge circuit is cut off without causing excessively stream to damage.
In all examples being illustrated and described herein, any occurrence should be construed as merely exemplary, and not
Be as restriction, therefore, other examples of exemplary embodiment can have different values.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined in individual accompanying drawing, then it need not be further defined and is explained in subsequent accompanying drawing.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more concrete and detailed, but and
Therefore limitation of the scope of the invention can not be interpreted as.It should be pointed out that for the person of ordinary skill of the art,
Without departing from the inventive concept of the premise, some deformations and improvement can also be made, these belong to the protection model of the present invention
Enclose.Therefore, protection scope of the present invention should be defined by claims.
Claims (10)
1. a kind of high-power lithium battery protector, it is characterised in that including collecting unit, control unit, driver element, perform list
Unit：
The collecting unit be used to gathering in charging and discharging currents, the lithium battery pack of lithium battery pack the voltage of single lithium battery and
The lithium battery pack and charger and the on off operating mode of load, and by the data output for collecting to described control unit；
Described control unit includes under-voltage protection control module, short-circuit protection control module, overcurrent protection control module, overcharges guarantor
Shield control module, for being contrasted according to the data for collecting and predetermined threshold, according to comparing result to the driver element
Send command signal；
The driver element is used for according to the command signal, drives the performance element execution action；
The performance element is used to perform the break-make switching to the lithium battery pack and the single lithium battery.
2. high-power lithium battery protector according to claim 1, it is characterised in that the collecting unit includes：
Voltage monitor, for gathering the voltage of the single lithium battery；
Current monitor, for gathering the charging and discharging currents of the lithium battery pack.
3. high-power lithium battery protector according to claim 2, it is characterised in that the under-voltage protection control module bag
Include under-voltage comparator, under-voltage signal generator and under-voltage controller：
The under-voltage comparator is used to compare the detected value of the voltage monitor with brownout threshold；
The under-voltage signal generator produces control level signal according to the comparative result of the under-voltage comparator；
The under-voltage controller includes a NPN type triode, and the base stage of the NPN type triode is owed by a resistor with described
The output end connection of pressure signal generator, is connected with a capacitor between the base stage and emitter stage of the NPN type triode, described
The colelctor electrode of NPN type triode is connected with the driver element.
4. high-power lithium battery protector according to claim 1, it is characterised in that the short-circuit protection control module bag
A NPN type triode is included, the emitter stage of the NPN type triode is connected with the negative pole of the lithium battery pack, the pole of the NPN type three
The base stage of pipe is connected by a capacitor with the negative pole of the lithium battery pack, the colelctor electrode of the NPN type triode and the drive
Moving cell connects, and the base stage of the NPN type triode is connected by a resistor with the negative pole of the cell.
5. high-power lithium battery protector according to claim 2, it is characterised in that the overcurrent protection control module bag
Include excessively stream comparator, over-current signal generator and cross stream controller：
The excessively stream comparator is used to compare the detected value of the voltage monitor with excessively stream threshold value；
The over-current signal generator produces control level signal according to the comparative result of the excessively stream comparator；
The stream controller of crossing includes that at least one is used to control the NPN type triode of the driver element.
6. high-power lithium battery protector according to claim 1, it is characterised in that described to overcharge protection control module bag
Include and overcharge comparator, overcharge signal generator and overcharge controller：
It is described to overcharge comparator for the detected value of the voltage monitor to be compared with threshold value is overcharged；
The signal generator that overcharges produces control level signal according to the comparative result for overcharging comparator, and will be described
Control level signal is exported to described and overcharges controller；
The controller that overcharges is used to control the NPN type triode of the driver element including at least one.
7. high-power lithium battery protector according to claim 1, it is characterised in that the driver element includes at least
Individual charging drives half-bridge, and the charging drives half-bridge to include a NPN type triode and a PNP type triode：
The emitter stage of the NPN type triode is connected with the emitter stage of the PNP type triode；
The base stage of the NPN type triode is connected with the emitter stage of the PNP type triode.
8. high-power lithium battery protector according to claim 1, it is characterised in that the driver element includes at least
Individual electric discharge drives half-bridge, the electric discharge to drive half-bridge to include a NPN type triode and a PNP type triode：
The emitter stage of the NPN type triode is connected with the emitter stage of the PNP type triode；
The base stage of the NPN type triode is connected with the emitter stage of the PNP type triode.
9. high-power lithium battery protector according to claim 1, it is characterised in that the performance element includes at least
Individual charging actuator and at least one electric discharge actuator：
The charging actuator is used for the charging circuit of lithium battery pack described in on/off and the single lithium battery；
The electric discharge actuator is used for the discharge circuit of lithium battery pack described in on/off and the single lithium battery.
10. high-power lithium battery protector according to claim 1, it is characterised in that the charging actuator includes many
The individual charged side metal-oxide-semiconductor being connected in parallel, the grid of the charged side metal-oxide-semiconductor is connected with the driver element, charged side MOS
The source electrode of pipe is connected with the negative pole of the charger, and the drain electrode of the charged side metal-oxide-semiconductor is connected with the negative pole of the lithium battery pack；
And/or, it is described electric discharge actuator include multiple discharge side metal-oxide-semiconductors being connected in parallel, the grid of the discharge side metal-oxide-semiconductor with
The driver element connection, the source electrode of the discharge side metal-oxide-semiconductor is connected with the negative pole of the single lithium battery, the discharge side
The drain electrode of metal-oxide-semiconductor is connected with the negative pole of the lithium battery pack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710041936.2A CN106655107A (en) | 2017-01-20 | 2017-01-20 | High power lithium battery protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710041936.2A CN106655107A (en) | 2017-01-20 | 2017-01-20 | High power lithium battery protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106655107A true CN106655107A (en) | 2017-05-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710041936.2A Pending CN106655107A (en) | 2017-01-20 | 2017-01-20 | High power lithium battery protector |
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| Country | Link |
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| CN (1) | CN106655107A (en) |
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| CN110336252A (en) * | 2019-08-16 | 2019-10-15 | 深圳市智微智能软件开发有限公司 | Space solid state distribution protects circuit, method and power supply-distribution system |
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