CN209104825U - Lithium iron phosphate battery protecting board - Google Patents
Lithium iron phosphate battery protecting board Download PDFInfo
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- CN209104825U CN209104825U CN201821663841.0U CN201821663841U CN209104825U CN 209104825 U CN209104825 U CN 209104825U CN 201821663841 U CN201821663841 U CN 201821663841U CN 209104825 U CN209104825 U CN 209104825U
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- ferric phosphate
- lithium cell
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The purpose of the utility model is to provide a kind of lithium iron phosphate battery protecting boards, the utility model includes: ferric phosphate lithium cell managing chip, resistance R4, resistance R9, R11, R8 and R3, thermal protector KT, capacitor C1, C2, C3, C4, resistance R6, resistance R5, resistance R10, capacitor C6, C7, resistance R01, resistance R15, resistance R12, metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2, resistance R13, R14, the utility model is realized by privacy protection plate effectively fills battery pack, electric discharge is monitored in real time and is protected, prevent battery pack from overcharging, over-discharge, overheat, the safety protection functions such as overcurrent, the utility model can effectively prevent over-charging of battery, over-discharge, overcurrent, short circuit, and the work circumstances safe of superhigh temperature, ensure that battery pack is safely and effectively transported Row.
Description
Technical field
The utility model relates to a kind of lithium iron phosphate battery protecting boards.
Background technique
Ferric phosphate lithium cell is currently as a kind of novel environment friendly, efficiently, the power battery that moment can be large current discharge, and solely
Special performance is gradually acceptable to the market, and is mainly used in solar street light, electric tool, automobile, train at present.The neck such as high-speed rail
The reference voltage in domain, lithium iron phosphate dynamic battery is 3.2V, to satisfy the use demand, multiple batteries must be connected and reach required
Voltage, and with a collection of battery core after being made into, their capacity and internal resistance are all led in the presence of difference, therefore are had to before the combination
Difference is led lesser battery and fits over one group, with the purpose of the service life cycle of the extension battery reached a certain level.For
The battery pack that multiple battery strings form together need to carry out charge and discharge process, solar street light to every batteries of the battery pack
Due to requiring using higher input voltage, even moment variable voltage, existing universal battery protection board cannot
Meet the battery in the popularization and application of field of solar energy, hinders it in the popularization in the field.
In order to solve this problem, it is necessary to, the electronic device of resistance to instantaneous large-current impact very high using pressure voltage, such gesture
Volume must be caused big, it is at high cost, the demand for development of technology cannot be suitble to.
Utility model content
One purpose of the utility model is to provide a kind of lithium iron phosphate battery protecting board.
One aspect according to the present utility model provides a kind of lithium iron phosphate battery protecting board, the ferric phosphate lithium cell
Protection board includes:
Ferric phosphate lithium cell managing chip, the ferric phosphate lithium cell managing chip include 1~16 foot, the LiFePO4
Battery management chip for example can be SH367003XBAAOO chip, wherein after 4 section LiFePO4 pond BT1~BT4 series connection, phosphorus
15 feet that the anode of sour iron lithium pond BT4 is connected to ferric phosphate lithium cell managing chip provide electricity for ferric phosphate lithium cell managing chip
Source anode；
The cathode of a termination LiFePO4 pond BT1 of resistance R4, the resistance R4, another termination of the resistance R4
7 feet of the ferric phosphate lithium cell managing chip, wherein the cathode of the LiFePO4 pond BT1 is connected to by the resistance R4
7 feet of the ferric phosphate lithium cell managing chip are the ferric phosphate lithium cell managing chip power supply source cathode,；
Resistance R9, R11, R8 and R3, one end of the resistance R9 connect 15 feet of the ferric phosphate lithium cell managing chip,
One end of the resistance R9 connect the LiFePO4 pond BT4 anode (；
One end of the resistance R11 connects 14 feet of the ferric phosphate lithium cell managing chip, and the resistance R11's is another
End is separately connected the anode of the LiFePO4 pond BT3 and the cathode of the LiFePO4 pond BT4；
One end of the resistance R8 connects 13 feet of the ferric phosphate lithium cell managing chip, the other end of the resistance R8
Connect the anode of the LiFePO4 pond BT2 and the cathode of the LiFePO4 pond BT3；
One end of the resistance R3 connects 12 feet of the ferric phosphate lithium cell managing chip, the other end of the resistance R3
Connect the anode of the LiFePO4 pond BT1；
Thermal protector KT, the thermal protector KT be serially connected in the LiFePO4 pond BT2 and LiFePO4 pond BT3 it
Between；
The anode of LiFePO4 pond BT4 described in capacitor C1, C2, C3, C4, an end Jie of described capacitor C1, C2, C3, C4,
On another 12 feet for terminating at ferric phosphate lithium cell managing chip of the capacitor C1, the capacitor C2 it is another terminate at it is described
On 13 feet of ferric phosphate lithium cell managing chip, the another of the capacitor C3 terminates at the ferric phosphate lithium cell managing chip
On 14 feet, on another 15 feet for terminating at the ferric phosphate lithium cell managing chip of the capacitor C4；
11 feet of a termination ferric phosphate lithium cell managing chip of resistance R6, the resistance R6, the resistance R6's
Another termination 7 foot of ferric phosphate lithium cell managing chip；
12 feet of a termination ferric phosphate lithium cell managing chip of resistance R5, the resistance R5, the resistance R5's
7 feet of another termination ferric phosphate lithium cell management；
10 feet of a termination ferric phosphate lithium cell managing chip of resistance R10, the resistance R10, the resistance R10
Another termination LiFePO4 pond BT4 anode；
Capacitor C6, C7,7 feet of a termination ferric phosphate lithium cell managing chip of described capacitor C6, C7, the capacitor
The other end of C6 connects 6 feet of the ferric phosphate lithium cell managing chip respectively, and the capacitor C7 connects the ferric phosphate lithium cell pipe
Manage 5 feet of chip；
The cathode of a termination LiFePO4 pond BT1 of resistance R01, the resistance R01, the resistance R01's is another
Terminate P- output negative pole；
A termination P- output negative pole of resistance R15, the resistance R15, described in another termination of the resistance R15
4 feet of ferric phosphate lithium cell managing chip；
3 feet of a termination ferric phosphate lithium cell managing chip of resistance R12, the resistance R12；
Metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2, the other end of the connection resistance R12 of the metal-oxide-semiconductor Q1 grid, the metal-oxide-semiconductor Q1
It links together with the pole D of metal-oxide-semiconductor Q2, the pole S of the metal-oxide-semiconductor Q1 connects in P+ output stage, and the pole S of the metal-oxide-semiconductor Q2 connects in institute
State the anode of LiFePO4 pond BT4；
Resistance R13, R14, an end Jie P+ of described resistance R13, R14, the another of the resistance R13 terminate at the phosphorus
2 feet of sour lithium iron battery managing chip, another 1 foot for terminating at the ferric phosphate lithium cell managing chip of the resistance R14.
Further, it in the lithium iron phosphate battery protecting board, when charging normal, is managed by the ferric phosphate lithium cell
1 foot and resistance R14 of chip provide conducting voltage to metal-oxide-semiconductor Q1, charge normal；
Charging is fast when completing, in 12 feet and the ferric phosphate lithium cell BT1 of the ferric phosphate lithium cell managing chip
14 feet and 15 of cathode, 13 feet of the ferric phosphate lithium cell managing chip and 14 feet, the ferric phosphate lithium cell managing chip
Foot, the ferric phosphate lithium cell managing chip 15 feet and 16 feet between, if detect certain single-unit ferric phosphate lithium cell BT1 or
The voltage of BT2 or BT3 or BT4 is more than 3.75V, and the inside of the ferric phosphate lithium cell managing chip is to the signal processing detected
Afterwards, the MOSFET pipe Q1 is controlled by 1 foot of the ferric phosphate lithium cell managing chip makes its closing, thus charge closing
Circuit protects the LiFePO4 pond BT1~BT4 not overcharged.
Further, in the lithium iron phosphate battery protecting board, in electric discharge, in the ferric phosphate lithium cell managing chip
12 feet and the cathode of the LiFePO4 pond BT1, the ferric phosphate lithium cell managing chip 13 feet and 14 feet, the phosphoric acid
Between 14 feet and 15 feet of lithium iron battery managing chip, 15 feet and 16 feet of the ferric phosphate lithium cell managing chip, if detection
Be lower than 2.0V to certain single battery voltage, inside the ferric phosphate lithium cell managing chip to the signal processing detected after, lead to
3 feet of the ferric phosphate lithium cell managing chip are crossed to control the MOSFET pipe Q2 and make its closing, so that discharge loop is closed,
Protect the LiFePO4 pond BT1~BT4 not by over-discharge.
It further, is more than to set when the electric current of external short circuit or electrical appliance is excessive in the lithium iron phosphate battery protecting board
Definite value, then the voltage of described resistance R01, R02 will increase, and voltage is sent to the ferric phosphate lithium cell pipe by the resistance R15
4 feet of chip are managed, the ferric phosphate lithium cell managing chip is by the voltage received from the resistance R15 and the LiFePO4
A reference value inside battery management chip compares, when the voltage received from the resistance R15 is higher than a reference value, the phosphorus
Sour lithium iron battery managing chip closes output by the 3 foot control MOSFET pipe Q2 that the ferric phosphate lithium cell manages, if while
The electric current that MOSFET pipe Q1, Q2 flow through is excessive, the voltage (pipe between 2 feet and 16 feet of the ferric phosphate lithium cell managing chip
Pressure drop) exceed the ferric phosphate lithium cell managing chip setting value, the ferric phosphate lithium cell managing chip pass through the phosphorus
MOSFET pipe Q2 described in 3 foot control systems of sour lithium iron battery management closes output.
Further, in the lithium iron phosphate battery protecting board, when environment temperature is higher than 75 degrees Celsius, the Thermal protection
Device KT is disconnected rapidly, to disconnect the charging and discharging circuit of the LiFePO4 pond BT1~BT4 in time.
Further, in the lithium iron phosphate battery protecting board, 10 feet of the ferric phosphate lithium cell managing chip pass through
Resistance R10 connects the anode in the LiFePO4 pond BT4, with 4 string battery mode of selection.
Further, in the lithium iron phosphate battery protecting board, 5 feet of the ferric phosphate lithium cell managing chip pass through electricity
Hold C7 ground connection, by changing the size of capacitor C7 to change overdischarge delay time.
Further, in the lithium iron phosphate battery protecting board, 6 foot CCT of the ferric phosphate lithium cell managing chip are logical
Capacitor C6 ground connection is crossed, by changing the size of capacitor C6 to change overcharge delay time.
Compared with prior art, the utility model realized by privacy protection plate effectively to the charge and discharge of battery pack into
Row real time monitoring and protection, prevent battery pack from overcharging, and over-discharge, overheat, the safety protection functions such as overcurrent, the utility model can be effective
Prevent over-charging of battery, over-discharge, overcurrent, short-circuit and superhigh temperature work circumstances safe, it is ensured that battery pack safe and effective operation.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, the utility model
Other features, objects and advantages will become more apparent upon:
Fig. 1 shows a kind of circuit diagram of lithium iron phosphate battery protecting board according to the utility model one aspect.
The same or similar appended drawing reference represents the same or similar component in attached drawing.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing.
As shown in Figure 1, the utility model provides a kind of lithium iron phosphate battery protecting board, comprising:
Ferric phosphate lithium cell managing chip, the ferric phosphate lithium cell managing chip include 1~16 foot, the LiFePO4
Battery management chip for example can be SH367003XBAAOO chip, wherein after 4 section LiFePO4 pond BT1~BT4 series connection, phosphorus
15 feet that the anode of sour iron lithium pond BT4 is connected to ferric phosphate lithium cell managing chip provide electricity for ferric phosphate lithium cell managing chip
Source anode；
The cathode of a termination LiFePO4 pond BT1 of resistance R4, the resistance R4, another termination of the resistance R4
7 feet of the ferric phosphate lithium cell managing chip, wherein the cathode of the LiFePO4 pond BT1 is connected to by the resistance R4
7 feet of the ferric phosphate lithium cell managing chip are the ferric phosphate lithium cell managing chip power supply source cathode,；
Resistance R9, R11, R8 and R3, one end of the resistance R9 connect 15 feet of the ferric phosphate lithium cell managing chip,
One end of the resistance R9 connects the anode (12.8V, Section 4 anode) of the LiFePO4 pond BT4；
One end of the resistance R11 connects 14 feet of the ferric phosphate lithium cell managing chip, and the resistance R11's is another
(9.6V, Section 3 battery is just for the anode and the cathode of the LiFePO4 pond BT4 that end is separately connected the LiFePO4 pond BT3
Pole, Section 4 battery cathode)；
One end of the resistance R8 connects 13 feet of the ferric phosphate lithium cell managing chip, the other end of the resistance R8
Connect the anode of the LiFePO4 pond BT2 and cathode (6.4V, Section 2 anode, Section 3 of the LiFePO4 pond BT3
Battery cathode)；
One end of the resistance R3 connects 12 feet of the ferric phosphate lithium cell managing chip, the other end of the resistance R3
Connect the anode (3.2V, Section 1 anode) of the LiFePO4 pond BT1；
Thermal protector KT, the thermal protector KT be serially connected in the LiFePO4 pond BT2 and LiFePO4 pond BT3 it
Between；
The anode of LiFePO4 pond BT4 described in capacitor C1, C2, C3, C4, an end Jie of described capacitor C1, C2, C3, C4,
On another 12 feet for terminating at ferric phosphate lithium cell managing chip of the capacitor C1, the capacitor C2 it is another terminate at it is described
On 13 feet of ferric phosphate lithium cell managing chip, the another of the capacitor C3 terminates at the ferric phosphate lithium cell managing chip
On 14 feet, on another 15 feet for terminating at the ferric phosphate lithium cell managing chip of the capacitor C4；
11 feet of a termination ferric phosphate lithium cell managing chip of resistance R6, the resistance R6, the resistance R6's
Another termination 7 foot of ferric phosphate lithium cell managing chip；
12 feet of a termination ferric phosphate lithium cell managing chip of resistance R5, the resistance R5, the resistance R5's
7 feet of another termination ferric phosphate lithium cell management；
10 feet of a termination ferric phosphate lithium cell managing chip of resistance R10, the resistance R10, the resistance R10
Another termination LiFePO4 pond BT4 anode；
Capacitor C6, C7,7 feet of a termination ferric phosphate lithium cell managing chip of described capacitor C6, C7, the capacitor
The other end of C6 connects 6 feet of the ferric phosphate lithium cell managing chip respectively, and the capacitor C7 connects the ferric phosphate lithium cell pipe
Manage 5 feet of chip；
The cathode of a termination LiFePO4 pond BT1 of resistance R01, the resistance R01, the resistance R01's is another
Terminate P- output negative pole；
A termination P- output negative pole of resistance R15, the resistance R15, described in another termination of the resistance R15
4 feet of ferric phosphate lithium cell managing chip；
3 feet of a termination ferric phosphate lithium cell managing chip of resistance R12, the resistance R12；
Metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2, the other end of the connection resistance R12 of the metal-oxide-semiconductor Q1 grid, the metal-oxide-semiconductor Q1
It links together with the pole D of metal-oxide-semiconductor Q2, the pole S of the metal-oxide-semiconductor Q1 connects in P+ output stage, and the pole S of the metal-oxide-semiconductor Q2 connects in institute
State the anode of LiFePO4 pond BT4；
Resistance R13, R14, an end Jie P+ of described resistance R13, R14, the another of the resistance R13 terminate at the phosphorus
2 feet of sour lithium iron battery managing chip, another 1 foot for terminating at the ferric phosphate lithium cell managing chip of the resistance R14.
Specifically, the function of each foot of the ferric phosphate lithium cell managing chip is as shown in the table:
In one embodiment of lithium iron phosphate battery protecting board of the utility model, when charging normal, by the LiFePO4
1 foot and resistance R14 of battery management chip provide conducting voltage to metal-oxide-semiconductor Q1, charge normal；
Charging is fast when completing, in 12 feet and the ferric phosphate lithium cell BT1 of the ferric phosphate lithium cell managing chip
14 feet and 15 of cathode, 13 feet of the ferric phosphate lithium cell managing chip and 14 feet, the ferric phosphate lithium cell managing chip
Foot, the ferric phosphate lithium cell managing chip 15 feet and 16 feet between, if detect certain single-unit ferric phosphate lithium cell BT1 or
The voltage of BT2 or BT3 or BT4 is more than 3.75V, and the inside of the ferric phosphate lithium cell managing chip is to the signal processing detected
Afterwards, the MOSFET pipe Q1 is controlled by 1 foot of the ferric phosphate lithium cell managing chip makes its closing, thus charge closing
Circuit protects the LiFePO4 pond BT1~BT4 not overcharged.
Here, the present embodiment can be realized the charging protection function excessively of ferric phosphate lithium cell.
In one embodiment of lithium iron phosphate battery protecting board of the utility model, in electric discharge, in the ferric phosphate lithium cell
The cathode of 12 feet of managing chip and the LiFePO4 pond BT1,13 feet of the ferric phosphate lithium cell managing chip and 14 feet,
14 feet and 15 feet of the ferric phosphate lithium cell managing chip, 15 feet of the ferric phosphate lithium cell managing chip and 16 feet it
Between, if detecting certain single battery voltage lower than 2.0V, to the signal detected inside the ferric phosphate lithium cell managing chip
After processing, the MOSFET pipe Q2 is controlled by 3 feet of the ferric phosphate lithium cell managing chip makes its closing, to close
Discharge loop protects the LiFePO4 pond BT1~BT4 not by over-discharge.
Here, the present embodiment realizes the Cross prevention of LiFePO4 pond BT1~BT4.
In one embodiment of lithium iron phosphate battery protecting board of the utility model, when the electric current of external short circuit or electrical appliance is excessive
More than setting value, then the voltage of described resistance R01, R02 will increase, and voltage is sent to the LiFePO4 by the resistance R15
4 feet of battery management chip, the ferric phosphate lithium cell managing chip is by the voltage received from the resistance R15 and the phosphorus
A reference value inside sour lithium iron battery managing chip compares, when the voltage received from the resistance R15 be higher than a reference value,
The ferric phosphate lithium cell managing chip closes output by the 3 foot control MOSFET pipe Q2 that the ferric phosphate lithium cell manages,
If the electric current that MOSFET pipe Q1, Q2 flow through simultaneously is excessive, the electricity between 2 feet and 16 feet of the ferric phosphate lithium cell managing chip
(tube voltage drop) is pressed to exceed the setting value of the ferric phosphate lithium cell managing chip, the ferric phosphate lithium cell managing chip passes through institute
State MOSFET pipe Q2 described in 3 foot control systems of ferric phosphate lithium cell management and close output, duplicate protection power tube and battery, not by
The high current damage component and battery of short circuit.
Here, the present embodiment realizes short-circuit protection and the overcurrent protection of ferric phosphate lithium cell.
In addition, capacitor C1, C2, C3, C4, one end is connect respectively in chip 15 foot VC1,14 foot VC2,13 foot VC3,12 foot VC4,
The another of capacitor terminates at Section 4 anode, can effectively prevent voltage it is micro- tremble enhancing it is anti-interference.
In one embodiment of lithium iron phosphate battery protecting board of the utility model, when environment temperature is higher than 75 degrees Celsius, institute
It states thermal protector KT to disconnect rapidly, to disconnect the charging and discharging circuit of the LiFePO4 pond BT1~BT4 in time, ensure that phosphoric acid
Lithium iron battery does not work under high temperature environment.
Here, the present embodiment realizes the high temperature protection of ferric phosphate lithium cell.
In one embodiment of lithium iron phosphate battery protecting board of the utility model, the 10 of the ferric phosphate lithium cell managing chip
Foot connects the anode in the LiFePO4 pond BT4 by resistance R10, with 4 string battery mode of selection.
Here, 10 feet of the ferric phosphate lithium cell managing chip are connect by resistance R10 the LiFePO4 pond BT4's
Anode, the ferric phosphate lithium cell managing chip pass through 4 string battery mode of internal switch selection.
In one embodiment of lithium iron phosphate battery protecting board of the utility model, the 5 of the ferric phosphate lithium cell managing chip
Foot is grounded by capacitor C7, by changing the size of capacitor C7 to change overdischarge delay time.
In one embodiment of lithium iron phosphate battery protecting board of the utility model, the 6 of the ferric phosphate lithium cell managing chip
Foot CCT is grounded by capacitor C6, by changing the size of capacitor C6 to change overcharge delay time.
In conclusion protection plate special for iron phosphate lithium batteries provided by the utility model, is realized by privacy protection plate
Effectively the charge and discharge of battery pack are monitored in real time and protected, prevent battery pack from overcharging, over-discharge, overheat, the safety guarantor such as overcurrent
Protective function, the utility model can effectively prevent over-charging of battery, over-discharge, overcurrent, the work circumstances safe of short circuit and superhigh temperature, really
Protect battery pack safe and effective operation.
Obviously, those skilled in the art can carry out various modification and variations without departing from the essence of the application to the application
Mind and range.In this way, if these modifications and variations of the application belong to the range of the claim of this application and its equivalent technologies
Within, then the application is also intended to include these modifications and variations.
It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and
And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms
Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new
The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in
All changes in justice and range are included in the utility model.It should not treat any reference in the claims as limiting
Related claim.Furthermore, it is to be understood that one word of " comprising " does not exclude other units or steps, odd number is not excluded for plural number.Device
The multiple units or device stated in claim can also be implemented through software or hardware by a unit or device.The
One, the second equal words are used to indicate names, and are not indicated any particular order.
Claims (8)
1. a kind of lithium iron phosphate battery protecting board, wherein the lithium iron phosphate battery protecting board includes:
Ferric phosphate lithium cell managing chip, the ferric phosphate lithium cell managing chip include 1~16 foot, the ferric phosphate lithium cell
Managing chip for example can be SH367003XBAAOO chip, wherein after 4 section LiFePO4 pond BT1~BT4 series connection, ferric phosphate
15 feet that the anode of lithium pond BT4 is connected to ferric phosphate lithium cell managing chip are providing power supply just for ferric phosphate lithium cell managing chip
Pole；
The cathode of a termination LiFePO4 pond BT1 of resistance R4, the resistance R4, described in another termination of the resistance R4
7 feet of ferric phosphate lithium cell managing chip, wherein the cathode of the LiFePO4 pond BT1 is connected to described by the resistance R4
7 feet of ferric phosphate lithium cell managing chip are the ferric phosphate lithium cell managing chip power supply source cathode；
Resistance R9, R11, R8 and R3, one end of the resistance R9 connects 15 feet of the ferric phosphate lithium cell managing chip, described
One end of resistance R9 connects the anode of the LiFePO4 pond BT4；
One end of the resistance R11 connects 14 feet of the ferric phosphate lithium cell managing chip, the other end point of the resistance R11
The anode of the LiFePO4 pond BT3 and the cathode of the LiFePO4 pond BT4 are not connected；
One end of the resistance R8 connects 13 feet of the ferric phosphate lithium cell managing chip, the other end connection of the resistance R8
The anode of the LiFePO4 pond BT2 and the cathode of the LiFePO4 pond BT3；
One end of the resistance R3 connects 12 feet of the ferric phosphate lithium cell managing chip, the other end connection of the resistance R3
The anode of the LiFePO4 pond BT1；
Thermal protector KT, the thermal protector KT are serially connected between the LiFePO4 pond BT2 and the LiFePO4 pond BT3；
The anode of LiFePO4 pond BT4 described in capacitor C1, C2, C3, C4, an end Jie of described capacitor C1, C2, C3, C4, it is described
On another 12 feet for terminating at ferric phosphate lithium cell managing chip of capacitor C1, the another of the capacitor C2 terminates at the phosphoric acid
On 13 feet of lithium iron battery managing chip, another 14 feet for terminating at the ferric phosphate lithium cell managing chip of the capacitor C3
On, on another 15 feet for terminating at the ferric phosphate lithium cell managing chip of the capacitor C4；
11 feet of a termination ferric phosphate lithium cell managing chip of resistance R6, the resistance R6, the resistance R6's is another
Terminate 7 foot of ferric phosphate lithium cell managing chip；
12 feet of a termination ferric phosphate lithium cell managing chip of resistance R5, the resistance R5, the resistance R5's is another
Terminate 7 feet of the ferric phosphate lithium cell management；
10 feet of a termination ferric phosphate lithium cell managing chip of resistance R10, the resistance R10, the resistance R10's is another
The anode of the one termination LiFePO4 pond BT4；
Capacitor C6, C7,7 feet of a termination ferric phosphate lithium cell managing chip of described capacitor C6, C7, the capacitor C6's
The other end connects 6 feet of the ferric phosphate lithium cell managing chip respectively, and the capacitor C7 connects the ferric phosphate lithium cell management core
5 feet of piece；
The cathode of a termination LiFePO4 pond BT1 of resistance R01, the resistance R01, another termination of the resistance R01
P- output negative pole；
A termination P- output negative pole of resistance R15, the resistance R15, another termination ferric phosphate of the resistance R15
4 feet of lithium battery managing chip；
3 feet of a termination ferric phosphate lithium cell managing chip of resistance R12, the resistance R12；
Metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2, the other end of the connection resistance R12 of the metal-oxide-semiconductor Q1 grid, the metal-oxide-semiconductor Q1 and
The pole D of metal-oxide-semiconductor Q2 links together, and the pole S of the metal-oxide-semiconductor Q1 connects in P+ output stage, and the pole S of the metal-oxide-semiconductor Q2 connects described
The anode of LiFePO4 pond BT4；
Resistance R13, R14, an end Jie P+ of described resistance R13, R14, the another of the resistance R13 terminate at the ferric phosphate
2 feet of lithium battery managing chip, another 1 foot for terminating at the ferric phosphate lithium cell managing chip of the resistance R14.
2. lithium iron phosphate battery protecting board according to claim 1, wherein when charging normal, by the LiFePO4
1 foot and resistance R14 of battery management chip provide conducting voltage to metal-oxide-semiconductor Q1, charge normal；
Charging is fast when completing, the ferric phosphate lithium cell managing chip 12 feet and the ferric phosphate lithium cell BT1 cathode,
13 feet and 14 feet of the ferric phosphate lithium cell managing chip, 14 feet of the ferric phosphate lithium cell managing chip and 15 feet, institute
State between 15 feet of ferric phosphate lithium cell managing chip and 16 feet, if detect certain single-unit ferric phosphate lithium cell BT1 or BT2 or
The voltage of BT3 or BT4 is more than 3.75V, after the inside of the ferric phosphate lithium cell managing chip is to the signal processing detected, is led to
1 foot of the ferric phosphate lithium cell managing chip is crossed to control the MOSFET pipe Q1 and make its closing, thus charge closing circuit,
The LiFePO4 pond BT1~BT4 is protected not overcharged.
3. lithium iron phosphate battery protecting board according to claim 1, wherein in electric discharge, in the ferric phosphate lithium cell
The cathode of 12 feet of managing chip and the LiFePO4 pond BT1,13 feet of the ferric phosphate lithium cell managing chip and 14 feet,
14 feet and 15 feet of the ferric phosphate lithium cell managing chip, 15 feet of the ferric phosphate lithium cell managing chip and 16 feet it
Between, if detecting certain single battery voltage lower than 2.0V, to the signal detected inside the ferric phosphate lithium cell managing chip
After processing, the MOSFET pipe Q2 is controlled by 3 feet of the ferric phosphate lithium cell managing chip makes its closing, to close
Discharge loop protects the LiFePO4 pond BT1~BT4 not by over-discharge.
4. lithium iron phosphate battery protecting board according to claim 1, wherein when the electric current of external short circuit or electrical appliance is excessive
More than setting value, then the voltage of described resistance R01, R02 will increase, and voltage is sent to the LiFePO4 by the resistance R15
4 feet of battery management chip, the ferric phosphate lithium cell managing chip is by the voltage received from the resistance R15 and the phosphorus
A reference value inside sour lithium iron battery managing chip compares, when the voltage received from the resistance R15 be higher than a reference value,
The ferric phosphate lithium cell managing chip closes output by the 3 foot control MOSFET pipe Q2 that the ferric phosphate lithium cell manages,
If the electric current that MOSFET pipe Q1, Q2 flow through simultaneously is excessive, the electricity between 2 feet and 16 feet of the ferric phosphate lithium cell managing chip
Pressure exceeds the setting value of the ferric phosphate lithium cell managing chip, and the ferric phosphate lithium cell managing chip passes through the ferric phosphate
MOSFET pipe Q2 described in 3 foot control systems of lithium battery management closes output.
5. lithium iron phosphate battery protecting board according to claim 1, wherein when environment temperature is higher than 75 degrees Celsius, institute
It states thermal protector KT to disconnect rapidly, to disconnect the charging and discharging circuit of the LiFePO4 pond BT1~BT4 in time.
6. lithium iron phosphate battery protecting board according to claim 1, wherein the 10 of the ferric phosphate lithium cell managing chip
Foot connects the anode in the LiFePO4 pond BT4 by resistance R10, with 4 string battery mode of selection.
7. lithium iron phosphate battery protecting board according to claim 1, wherein the 5 of the ferric phosphate lithium cell managing chip
Foot is grounded by capacitor C7, by changing the size of capacitor C7 to change overdischarge delay time.
8. lithium iron phosphate battery protecting board according to claim 1, wherein the 6 of the ferric phosphate lithium cell managing chip
Foot CCT is grounded by capacitor C6, by changing the size of capacitor C6 to change overcharge delay time.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109245223A (en) * | 2018-10-12 | 2019-01-18 | 上海铁路站场调速技术中心有限公司 | Lithium iron phosphate battery protecting board |
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| CN109245223A (en) * | 2018-10-12 | 2019-01-18 | 上海铁路站场调速技术中心有限公司 | Lithium iron phosphate battery protecting board |
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