CN109391010A - A kind of lithium battery high temperature automatic protection plate - Google Patents
A kind of lithium battery high temperature automatic protection plate Download PDFInfo
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- CN109391010A CN109391010A CN201811462428.2A CN201811462428A CN109391010A CN 109391010 A CN109391010 A CN 109391010A CN 201811462428 A CN201811462428 A CN 201811462428A CN 109391010 A CN109391010 A CN 109391010A
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Abstract
The present invention discloses a kind of lithium battery high temperature automatic protection plate, and wherein lithium battery high temperature automatic protection plate includes power module, charge and discharge control module, temperature protection module, power storage module；Charge and discharge control module receives power storage module voltage signal, when voltage signal is located at first voltage range, powers on module while connecting power storage module to circuit load power supply and charges to power storage module；Voltage signal powers to circuit load less than the first protection voltage threshold, shutdown power storage module；When voltage signal is greater than the second protection voltage threshold, power cutoff module charges to power storage module；Temperature protection module detects power storage module Current Temperatures, when Current Temperatures are greater than preset temperature, issues cut-off signals to charge and discharge control module, charge and discharge control module turns off power storage module and powers to circuit load.Technical solution of the present invention solves existing charge-discharge circuit and electronic equipment, and there are rechargeable battery overheats can not automatically power off the problems such as easily exploding.
Description
Technical field
The present invention relates to charging technique field, in particular to a kind of lithium battery high temperature automatic protection plate.
Background technique
Existing electronic equipment such as rechargeable table lamp etc. has rechargeable battery, to rechargeable battery when the not enough power supply of rechargeable battery
It can be used continuously corresponding electronic equipment after being charged, electronic equipment is typically provided with the protection circuit to rechargeable battery, protects
The voltage correspondence of protection circuit identification rechargeable battery makes protection plan.There are rechargeable batteries for existing charge-discharge circuit and electronic equipment
Overheat can not automatically power off the problems such as easily exploding.
Summary of the invention
The main object of the present invention is to provide a kind of lithium battery high temperature automatic protection plate, it is intended to solve existing charge and discharge electricity
There are rechargeable battery overheats can not automatically power off the problems such as easily exploding for road and electronic equipment.
To achieve the above object, lithium battery high temperature automatic protection plate proposed by the present invention, including power module, charge and discharge are automatically controlled
Molding block, temperature protection module, power storage module；The first input end and the power module of the charge and discharge control module connect
It connecing, the second input terminal is connect with the power storage module, and the first output end of the charge and discharge control module is connect with circuit load,
Second output terminal is connect with the power storage module, and the controlled end of the charge and discharge control module and the temperature protection module connect
It connects；
The charge and discharge control module is located at for receiving the voltage signal of the power storage module in the voltage signal
When first voltage range, module is powered on while connecting power storage module to circuit load power supply and is charged to power storage module；?
The voltage signal turns off the power storage module and powers to circuit load less than the first protection voltage threshold；Believe in the voltage
Number be greater than second protection voltage threshold when, turn off power storage module described in the electric power source pair of module charging；
The temperature protection module, for detecting the Current Temperatures of the power storage module, when the Current Temperatures are greater than in advance
If when temperature, Xiang Suoshu charge and discharge control module issues cut-off signals, and the charge and discharge control module is according to the cut-off signals
The power storage module is turned off to power to the circuit load.
Preferably, the charge and discharge control module includes charge and discharge control chip U1 and semiconductor power device Q1；It is described
Charge and discharge control chip U1 has discharge control terminal OD, charge control end OC, over-current detection end CS, power end VDD and ground terminal
The end VSS, the semiconductor power device Q1 include connected the first field-effect tube MOS1 and the second field-effect tube MOS2 of drain electrode；Institute
It states power end VDD to connect with the anode of the power storage module, the ground terminal VSS is connect with the cathode of the power storage module, institute
The source S 1 for stating the first field-effect tube MOS1 is connect with the cathode of the power storage module, the grid of the first field-effect tube MOS1
G1 is connect with the discharge control terminal OD, and the source S 2 of the second field-effect tube MOS2 is connect to the cathode with load, institute
The grid G 2 for stating the second field-effect tube MOS2 is connect with the charge control end OC.
Preferably, the semiconductor power device Q1 is equipped at least two groups, and power device Q1 described in every group is corresponding described
Grid G 1 is connected setting, and the corresponding source S 1 of power device Q1 described in every group is connected setting；Function described in every group
The corresponding grid G 2 of rate device Q1 is connected setting, and the corresponding source S 2 of power device Q1 described in every group is connected
Connect setting.
Preferably, the temperature protection module includes thermistor R1, the first end and electric power storage mould of the thermistor R1
The anode connection of block, second end are connect with the source S 2.
Preferably, the temperature protection module further include protective resistance R2 and divider resistance R3, the protective resistance R2 and
The divider resistance R3 connects with the thermistor R1.
Preferably, the thermistor R1 is NTC type.
Preferably, the charge and discharge control module further includes reset switch K1, one end of the reset switch K1 with it is described
The over-current detection end CS connection other end is connect with the power storage module cathode.
Preferably, the power module includes charger and the anode and charger of diode D1, the diode D1
Anode connection, the cathode of the diode D1 are connect with the anode of the power storage module.
Preferably, filter capacitor C1, the power end VDD are equipped between the power end VDD and the end the ground terminal VSS
Current-limiting resistance R4 is also in series between the anode of power storage module.
Technical solution of the present invention passes through setting control power module, charge and discharge control module, temperature protection module, electric power storage mould
Block forms a kind of lithium battery high temperature automatic protection plate.The temperature protection module, for detecting the current of the power storage module
Temperature, when the Current Temperatures are greater than preset temperature, Xiang Suoshu charge and discharge control module issues cut-off signals, the charge and discharge
Control module turns off the power storage module according to the cut-off signals and powers to the circuit load, solves existing charge and discharge
There are rechargeable battery overheats can not automatically power off the problems such as easily exploding for circuit and electronic equipment.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the functional block diagram of one embodiment of lithium battery high temperature automatic protection plate of the present invention；
Fig. 2 is the electrical block diagram of one embodiment of lithium battery high temperature automatic protection plate of the present invention；
Fig. 3 is the circuit theory schematic diagram of charge and discharge control chip U1 described in the present embodiment；
Fig. 4 is the electrical block diagram of semiconductor power device Q1 described in the present embodiment.
Drawing reference numeral explanation:
| Label | Title | Label | Title |
| 100 | Power module | 101 | Charger |
| D1 | Diode | 200 | Charge and discharge control module |
| U1 | Charge and discharge control chip | OD | Discharge control terminal |
| OC | Charge control end | CS | Over-current detection end |
| VDD | Power end | Q1 | Semiconductor power device |
| MOS1 | First field-effect tube | MOS2 | Second effect pipe |
| S1-S2 | Field-effect tube source electrode | G1-G2 | Fet gate |
| 300 | Temperature protection module | R1 | Thermistor |
| R2 | Protective resistance | R3 | Divider resistance |
| R4 | Current-limiting resistance | C1 | Filter capacitor |
| K1 | Reset switch | 400 | Power storage module |
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
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.
In addition, the description for being related to " first ", " second " etc. in the present invention is used for description purposes only, and should not be understood as referring to
Show or imply its relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " are defined as a result,
Two " feature can explicitly or implicitly include at least one of the features.In addition, the technical solution between each embodiment can
It to 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 occurs
It is conflicting or when cannot achieve should people think that the combination of this technical solution is not present, also not the present invention claims protection
Within the scope of.
The present invention proposes a kind of lithium battery high temperature automatic protection plate.
Referring to Fig.1, in embodiments of the present invention, which includes power module 100, charge and discharge
Control module 200, temperature protection module 300, power storage module 400；The first input end of the charge and discharge control module 200 and institute
The connection of power module 100 is stated, the second input terminal is connect with the power storage module 400, and the first of the charge and discharge control module 200
Output end is connect with circuit load, and second output terminal is connect with the power storage module 400, the charge and discharge control module 200
Controlled end is connect with the temperature protection module 300；The charge and discharge control module 200, for receiving the power storage module 400
Voltage signal, when the voltage signal is located at first voltage range, connect the power storage module 400 give circuit load power supply
While power on module 100 give power storage module 400 charge；In the voltage signal less than the first protection voltage threshold, close
The power storage module 400 of breaking powers to circuit load；When the voltage signal is greater than the second protection voltage threshold, described in shutdown
Power module 100 charges to the power storage module 400；The temperature protection module 300, for detecting the power storage module 400
Current Temperatures, when the Current Temperatures be greater than preset temperature when, Xiang Suoshu charge and discharge control module 200 issue cut-off signals,
The charge and discharge control module 200 turns off the power storage module 400 according to the cut-off signals and powers to the circuit load.
It should be noted that the first protection voltage threshold is the voltage of 400 over-discharge of power storage module, it is possible to understand that
It is the critical value of over-discharge voltage for the first protection voltage threshold, the second protection voltage threshold is that power storage module 400 is excessively filled
The critical value of voltage when electric, make complete machine work normally voltage be first protection voltage threshold with second protection voltage threshold it
Between.The power module 100 can be adopted for charger 101 or rectification circuit, the charge and discharge control module 200
With by being installed with Preservation tactics battery management chip and support circuit realize, the battery management chip can be FM2113
Chip, the internal circuit diagram of the FM2113 chip is as shown in figure 3, the model of the battery management chip is not limited only to certainly
FM2113, specific chip can according to actual needs and the matching of existing chip parameter is selected, because of the battery management chip
Selecting is the prior art, is just only repeated herein.The temperature protection module 300 can be temperature sensor, thermistor etc.
Other convert temperature signal to the electronic component and support circuit of electric signal, and the selection of the temperature sensor model is existing
There is technology, i will not repeat them here, and the temperature that the temperature protection module 300 detects power storage module 400 is higher than the default temperature
When spending, the corresponding cut-off signals are issued, the cut-off signals can be the change of 300 output voltage of temperature protection module
Change；The power storage module 400 can may be lead storage battery etc. for lithium battery.
Technical solution of the present invention by setting power module 100, charge and discharge control module 200, temperature protection module 300,
Power storage module 400 forms a kind of lithium battery high temperature automatic protection plate.The temperature protection module 300, for detecting the storage
The Current Temperatures of electric module 400, when the Current Temperatures are greater than preset temperature, Xiang Suoshu charge and discharge control module 200 is issued
Cut-off signals, the charge and discharge control module 200 turn off the power storage module 400 according to the cut-off signals and bear to the circuit
Power supply is carried, existing charge-discharge circuit and electronic equipment is solved and can not be automatically powered off there are rechargeable battery overheat and easily exploded
The problems such as.
Specifically, the charge and discharge control module 200 includes charge and discharge control chip U1 and semiconductor in the present embodiment
Power device Q1, the charge and discharge control chip U1 can be FM2113 chip as shown in Figure 3, the semiconductor power device
Q1 can be N-channel enhancement mode FET, and the schematic diagram of N-channel enhancement mode FET is as shown in Figure 4；The charge and discharge is automatically controlled
Coremaking piece U1 has discharge control terminal OD, charge control end OC, over-current detection end CS, power end VDD and the end ground terminal VSS, institute
Stating semiconductor power device Q1 includes connected the first field-effect tube MOS1 and the second field-effect tube MOS2 of drain electrode；The power end
VDD is connect with the anode of the power storage module 400, and the ground terminal VSS is connect with the cathode of the power storage module 400, described
The source S 1 of first field-effect tube MOS1 is connect with the cathode of the power storage module 400, the grid of the first field-effect tube MOS1
Pole G1 is connect with the discharge control terminal OD, and the source S 2 of the second field-effect tube MOS2 is connect to the cathode with load,
The grid G 2 of the second field-effect tube MOS2 is connect with the charge control end OC.
The power end VDD of charge and discharge control chip U1 acquires 400 voltage of power storage module in real time, under normal operating conditions, stores
Electric 400 voltage of module detects voltage, that is, described first in over-discharge and protects voltage threshold i.e. described more than and less than detection voltage is overcharged
When the second protection voltage threshold, OC and the discharge control terminal OD are output high level, at this time the first field-effect tube MOS1 and
Second field-effect tube MOS2 is simultaneously turned on, and charge and discharge at this time can be normally carried out.When electric discharge, 400 voltage of power storage module is reduced
To more than over-discharge detection voltage, that is, described first protection voltage threshold, the discharge control terminal OD output of charge and discharge control chip U1 by
High level becomes low level, and the first field-effect tube MOS1 (electric discharge MOS) is closed, and stops electric discharge；Connect charger 101, electric power storage mould
400 voltage of block rises, greater than over-discharge voltage hereinafter, the discharge control terminal OD output of charge and discharge control chip U1 is become from low level
High level restores normal operating conditions.When charging, cell voltage overcharges the i.e. described second protection voltage threshold of protection voltage
More than, the charge control end OC of charge and discharge control chip U1, which is exported from high level, becomes low level, and the second field-effect tube MOS2 (fills
Electric MOS) it closes, stop charging, connect load, cell voltage, which is pulled low, overcharges the i.e. described second protection voltage threshold of protection voltage
Hereinafter, the charge control end OC output of charge and discharge control chip U1 becomes high level from low level, restore normal operating conditions.
Specifically, it please refers to shown in Fig. 2, the semiconductor power device Q1 is equipped at least two groups, power device described in every group
The corresponding grid G 1 of part Q1 is connected setting, and the corresponding source S 1 of power device Q1 described in every group, which is connected, to be set
It sets；The corresponding grid G 2 of power device Q1 described in every group is connected setting, the corresponding institute of power device Q1 described in every group
Source S 2 is stated to be connected setting.The semiconductor power device Q1, which is equipped with to share at least two groups, flows through each function
The electric current of rate device Q1, and when semiconductor power device Q1 is burnt wherein, other semiconductor power device Q1 appoint can be with
It realizes the protection for realizing charge and discharge to this circuit, and then increases the safety of this circuit.
Specifically, in the present embodiment as shown in Fig. 2, the temperature protection module 300 includes thermistor R1, the heat
The first end of quick resistance R1 is connect with the anode of power storage module 400, and second end is connect with the source S 2.The thermistor can
Think that NTC type can also be PTC type, in the present embodiment using lower-cost NTC type thermistor.
When electric discharge, when NTC type thermistor R1 detects temperature of current 400 temperature of power storage module more than protection, resistance value subtracts
It is small, over-current detection end CS can be more than protection voltage value, at this point, charge and discharge control chip U1 the discharge control terminal OD output by
High level becomes low level, and the first field-effect tube MOS1 (electric discharge MOS) is closed, and stops electric discharge；When charging, over-current detection end CS electricity
Pressure is negative, if NTC type thermistor R1 detection current battery temperature is more than the temperature of protection, the over-current detection end end CS voltage
Protection voltage value can be less than, at this point, the discharge control terminal OD of charge and discharge control chip U1, which is exported from high level, becomes low electricity
Flat, the first field-effect tube MOS1 (electric discharge MOS) is closed, and stops electric discharge；NTC type thermistor R1 detects 400 temperature of power storage module
Degree reduces, and when being lower than recovery temperature value, the discharge control terminal OD output of charge and discharge control chip U1 becomes high from low level
Level, the first field-effect tube MOS1 (electric discharge MOS) are opened, and restore normal operating conditions.
Further referring to Fig. 2, the temperature protection module 300 further includes protective resistance R2 in the present embodiment, and point
Piezoresistance R3, the protective resistance R2 and the divider resistance R3 connect with the thermistor R1.The protective resistance R2
Setting avoid thermistor R1 because temperature change resistance value reduction cause flow test side CS input current it is excessive caused by charge and discharge
Control the damage of chip U1.
Specifically, in the present embodiment, as shown in Fig. 2, the charge and discharge control module 200 further includes reset switch K1,
One end of the reset switch K1 connect the other end with the over-current detection end CS and connect with 400 cathode of power storage module.Make
If used time NTC type thermistor detect battery temperature reduction, be lower than recovery temperature value when, closure K1 by battery cathode with fill
101 cathode of electric appliance is shorted, so that the end CS voltage is restored to higher than overdischarge release voltage (VDR), then the charge and discharge control core
The discharge control terminal OD output of piece U1 becomes high level from low level, and the first field-effect tube MOS1 (electric discharge MOS) is opened, extensive
Multiple normal operating conditions.The reset switch K1 is avoided when battery temperature is reduced to recovery temperature value or less and can not be opened again
Generation, and then improve this product user experience.
In the present embodiment, as shown in Fig. 2, the power module 100 includes charger 101 and diode D1, described two
The anode of pole pipe D1 is connect with the anode of charger 101, and the anode of the cathode of the diode D1 and the power storage module 400 is even
It connects, the setting of the diode D1, which avoids battery, leads to burning for charger 101 to the reversely charging of charger 101.
Specifically, as shown in Fig. 2, being equipped with filter capacitor C1, institute between the power end VDD and the end the ground terminal VSS
It states and is also in series with current-limiting resistance R4 between power end VDD and the anode of power storage module 400.Power module 100 is through the current limliting electricity
Hinder shunt regulator, then filter out interference via filter capacitor C1 so that entirely loop stability and work normally, and then improve this electricity
The stability on road.
Lithium battery high temperature automatic protection plate of the invention can be used for electronic equipment, which includes that above-mentioned lithium battery is high
Warm automatic protection plate, the specific structure of the lithium battery high temperature automatic protection plate is referring to above-described embodiment, since this electronic equipment is adopted
Own with whole technical solutions of above-mentioned all embodiments, therefore at least brought by the technical solution with above-described embodiment
Beneficial effect, this is no longer going to repeat them.
The electronic equipment can be the electronic equipment that desk lamp capable of charging etc. has charge function.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all at this
Under the inventive concept of invention, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/use indirectly
It is included in other related technical areas in scope of patent protection of the invention.
Claims (9)
1. a kind of lithium battery high temperature automatic protection plate, which is characterized in that including power module (100), charge and discharge control module
(200), temperature protection module (300), power storage module (400)；The first input end of the charge and discharge control module (200) and institute
Power module (100) connection is stated, the second input terminal is connect with the power storage module (400), the charge and discharge control module (200)
The first output end connect with circuit load, second output terminal is connect with the power storage module (400), the charge and discharge control mould
The controlled end of block (200) is connect with the temperature protection module (300)；
The charge and discharge control module (200) is believed for receiving the voltage signal of the power storage module (400) in the voltage
Number be located at first voltage range when, connect power storage module (400) to circuit load power while power on module (100) to
Power storage module (400) charging；In the voltage signal less than the first protection voltage threshold, it is right to turn off the power storage module (400)
Circuit load power supply；When the voltage signal is greater than the second protection voltage threshold, the power module (100) is turned off to described
Power storage module (400) charging；
The temperature protection module (300), for detecting the Current Temperatures of the power storage module (400), when the Current Temperatures
When greater than preset temperature, Xiang Suoshu charge and discharge control module (200) issues cut-off signals, the charge and discharge control module (200)
The power storage module (400) is turned off according to the cut-off signals to power to the circuit load.
2. lithium battery high temperature automatic protection plate as described in claim 1, which is characterized in that the charge and discharge control module
It (200) include charge and discharge control chip U1 and semiconductor power device Q1；The charge and discharge control chip U1 has control of discharge
Hold OD, charge control end OC, over-current detection end CS, power end VDD and the end ground terminal VSS, the semiconductor power device Q1 packet
Include drain electrode connected the first field-effect tube MOS1 and the second field-effect tube MOS2；The power end VDD and the power storage module
(400) anode connection, the ground terminal VSS are connect with the cathode of the power storage module (400), first field-effect tube
The source S 1 of MOS1 is connect with the cathode of the power storage module (400), the grid G 1 of the first field-effect tube MOS1 with it is described
The source S 2 of discharge control terminal OD connection, the second field-effect tube MOS2 is connect to the cathode with load, and described second
The grid G 2 of effect pipe MOS2 is connect with the charge control end OC.
3. lithium battery high temperature automatic protection plate as claimed in claim 2, which is characterized in that the semiconductor power device Q1 is set
There are at least two groups, the corresponding grid G 1 of power device Q1 described in every group is connected setting, power device Q1 described in every group
The corresponding source S 1 is connected setting；The corresponding grid G 2 of power device Q1 described in every group is connected setting,
The corresponding source S 2 of power device Q1 described in every group is connected setting.
4. the lithium battery high temperature automatic protection plate as described in claims 1 to 3 any one, which is characterized in that the temperature is protected
Protecting module (300) includes thermistor R1, and the anode of the first end of the thermistor R1 and power storage module connects, second end with
It is connect with the source S 2.
5. lithium battery high temperature automatic protection plate as claimed in claim 4, which is characterized in that the temperature protection module further includes
Protective resistance R2 and divider resistance R3, the protective resistance R2 and the divider resistance R3 connect with the thermistor R1.
6. lithium battery high temperature automatic protection plate as described in claim 4 or 5, which is characterized in that the thermistor R1 is NTC
Type.
7. the lithium battery high temperature automatic protection plate as described in claim 2 to 6 any one, which is characterized in that the charge and discharge
Control module (200) further includes reset switch K1, and one end of the reset switch K1 connect another with the over-current detection end CS
End is connect with the power storage module (400) cathode.
8. lithium battery high temperature automatic protection plate as claimed in any one of claims 1 to 7, which is characterized in that the power supply mould
Block (100) includes that charger (101) and the anode of diode D1, the diode D1 and the anode of charger (101) are connect, institute
The cathode for stating diode D1 is connect with the anode of the power storage module (400).
9. the lithium battery high temperature automatic protection plate as described in claim 2 to 8 any one, which is characterized in that the power end
It is equipped between filter capacitor C1, the power end VDD and the anode of power storage module (400) between VDD and the end the ground terminal VSS
Also it is in series with current-limiting resistance R4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811462428.2A CN109391010A (en) | 2018-11-30 | 2018-11-30 | A kind of lithium battery high temperature automatic protection plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811462428.2A CN109391010A (en) | 2018-11-30 | 2018-11-30 | A kind of lithium battery high temperature automatic protection plate |
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| Publication Number | Publication Date |
|---|---|
| CN109391010A true CN109391010A (en) | 2019-02-26 |
Family
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| CN201811462428.2A Withdrawn CN109391010A (en) | 2018-11-30 | 2018-11-30 | A kind of lithium battery high temperature automatic protection plate |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111968355A (en) * | 2020-07-07 | 2020-11-20 | 邓棹予 | Control circuit of automatic control type mosquito killer |
| CN114301113A (en) * | 2021-12-03 | 2022-04-08 | 深圳市豪恩声学股份有限公司 | Charging protection circuit and charging device |
| CN114388908A (en) * | 2022-01-12 | 2022-04-22 | 深圳市吉美智科技有限公司 | Lithium battery protection board and safety system |
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