CN106684482A - Battery overcharge protection system - Google Patents
Battery overcharge protection system Download PDFInfo
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- CN106684482A CN106684482A CN201611241325.4A CN201611241325A CN106684482A CN 106684482 A CN106684482 A CN 106684482A CN 201611241325 A CN201611241325 A CN 201611241325A CN 106684482 A CN106684482 A CN 106684482A
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- 238000004891 communication Methods 0.000 claims description 43
- 238000009413 insulation Methods 0.000 claims description 35
- 238000012544 monitoring process Methods 0.000 claims description 33
- 230000005611 electricity Effects 0.000 claims description 10
- 239000003054 catalyst Substances 0.000 claims description 9
- 239000000178 monomer Substances 0.000 claims description 7
- 230000008054 signal transmission Effects 0.000 claims description 6
- 238000009432 framing Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims 1
- 238000003708 edge detection Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 5
- 230000009977 dual effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000009474 immediate action Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
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- H02J7/0026—
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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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- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Disclosed is a battery overcharge protection system. The battery overcharge protection system comprises a battery box, a plurality of battery management units, a battery control unit, a first switch and a charging pile, wherein the battery box comprises a plurality of battery packs connected in series; each battery management unit is used for outputting collected voltages of respective single batteries in the corresponding battery packs to the battery control unit; the battery control unit is used for picking out the highest voltage of the single batteries, working out the total voltage of the battery box, comparing the highest voltage of the single batteries with a first reference value and a second reference value, and comparing the total voltage of the battery box with a third reference value and a fourth reference value; and the battery control unit is also used for controlling the charging pile to stop the charging of the battery box when the highest voltage of the single batteries is greater than the first reference value and less than the second reference value or when the total voltage of the battery box is greater than the third reference value and less than the fourth reference value, and controlling the first switch to be switched off after a certain time delay. By virtue of the battery overcharge protection system, battery overcharging can be prevented.
Description
【Technical field】
The present invention relates to electric automobile field, more particularly to a kind of over-charging of battery protection system.
【Background technology】
With the continuous development of electric automobile industry, the safety of electric automobile is increasingly subject to people's attention, wherein filling
Electric safety is one of most important aspect in electric automobile safety.Charging CAN (Controller Area Network, controller
LAN) line open circuit, Communication Jamming, ECU (Electronic Control Unit, electronic control unit) failures, catalyst is stained with
Viscous grade may all cause over-charging of battery.Battery is once overcharged, and gently then causes self-discharge of battery, affects the service life of battery；Weight
Battery temperature is then caused to raise, so as to cause burning even to explode, therefore, over-charging of battery greatly have impact on the peace of electric automobile
Entirely.
In consideration of it, real be necessary to provide a kind of over-charging of battery protection system to overcome disadvantages described above.
【The content of the invention】
It is an object of the invention to provide a kind of over-charging of battery protection system that can prevent over-charging of battery.
To achieve these goals, the present invention provides a kind of over-charging of battery protection system, the over-charging of battery protection system
Including battery case, multiple battery management units, battery control unit, first switch, first interface and charging pile, the battery case
Including the set of cells of multiple series connection, the positive pole of the battery case is connected by the first switch with the first interface, described
The negative pole of battery case is connected with the first interface, each battery management unit set of cells corresponding with and the battery control
Unit processed is connected, and the battery control unit is connected with the first switch and the first interface, and the first interface is used for
Connect the charging pile, the charging pile is used to be charged to the battery case by the first interface and the first switch,
Each battery management unit is used to gather the voltage of cell in corresponding set of cells, and by the signal output for collecting to institute
State battery control unit, the battery control unit is used for the ceiling voltage for picking out cell according to the signal for receiving simultaneously
Calculate the total voltage of the battery case, and by the ceiling voltage of the cell and the first reference value and the second reference value ratio
Compared with, also the total voltage of the battery case is compared with the 3rd reference value and the 4th reference value, the battery control unit is additionally operable to
The cell ceiling voltage more than first reference value and less than second reference value or the battery case
Total voltage controls the charging pile and stops to the battery case more than the 3rd reference value and during less than four reference value
Charge, and control first switch after the delay and disconnect.
Compared to prior art, ceiling voltage of the present invention by the battery control unit in the cell is more than
First reference value and less than second reference value or the battery case total voltage more than the 3rd reference value and little
When four reference value, control the charging pile and stop being charged to the battery case, and control first switch after the delay
Disconnect, so as to effectively prevent over-charging of battery, and in terms of the voltage of cell and the total voltage two of the battery case
Battery in the battery case is carried out to overcharge protection, and has avoided the first switch contact and glued dead situation generation, entered
And improve safety and the reliability of the over-charging of battery protection system.
【Description of the drawings】
The theory diagram of the over-charging of battery protection system that Fig. 1 is provided for embodiments of the invention.
Fig. 2 is the circuit diagram of second switch in Fig. 1.
Fig. 3 is the circuit diagram of another embodiment of insulation monitoring module in Fig. 1.
Fig. 4 is the theory diagram of another embodiment of communication module in Fig. 1.
Fig. 5 is the schematic diagram of set of cells in Fig. 1.
【Specific embodiment】
In order that the purpose of the present invention, technical scheme and Advantageous Effects become apparent from understanding, below in conjunction with this
Accompanying drawing in bright embodiment, is clearly and completely described, it is clear that described to the technical scheme in the embodiment of the present invention
Embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.Based on the embodiment in the present invention, this area
The every other embodiment that those of ordinary skill is obtained under the premise of creative work is not made, belongs to protection of the present invention
Scope.
When an element was considered as with another element " being connected ", it can be directly to another element or
May be simultaneously present centering elements.Unless otherwise defined, all of technology used herein and scientific terminology with belong to this
The implication that bright those skilled in the art are generally understood that is identical.The term for being used in the description of the invention herein
It is intended merely to describe the purpose of specific embodiment, it is not intended that of the invention in limiting.Term as used herein " and/or " bag
Include the arbitrary and all of combination of one or more related Listed Items.
Refer to Fig. 1, the theory diagram of the over-charging of battery protection system 100 that Fig. 1 is provided for embodiments of the invention.It is described
Over-charging of battery protection system 100 includes battery case 10, multiple BMU (Battery Management Unit, battery management unit)
20th, BCU (Battery Control Unit, battery control units) 30, first switch 32, first interface 40 and charging pile 50.
The set of cells 12 of the battery case 10 including multiple series connection, the positive pole of the battery case 10 by the first switch 32 with it is described
First interface 40 is connected, and the negative pole of the battery case 10 is connected with the first interface 40.Each BMU 20 is corresponding with one
Set of cells 12 and the BCU 30 are connected.The BCU 30 is connected with the first switch 32 and the first interface 40.
The first interface 40 is used to connect the charging pile 50.The charging pile 50 is used to pass through the first interface 40
And the first switch 32 charges to the battery case 10.Each BMU 20 is used to gather cell in corresponding set of cells 12
The voltage of B1, and give the BCU 30 by the signal output for collecting.The BCU 30 is used to be selected according to the signal for receiving
Go out the ceiling voltage Vb of cell B1 and calculate total voltage Vbp of the battery case 10, and by the cell B1's
Ceiling voltage Vb compares with the first reference value Vref1 and the second reference value, also by total voltage Vbp of the battery case 10 and the 3rd
Reference value Vref3 and the 4th reference value compare.The BCU 30 is additionally operable to be more than in the ceiling voltage Vb of the cell B1
First reference value Vref1 and less than second reference value or the battery case 10 total voltage Vbp be more than the described 3rd
Reference value Vref3 and during less than four reference value, controls the charging pile 50 and stops to institute by the first interface 40
State battery case 10 to charge, and control first switch 32 after the delay and disconnect.
The over-charging of battery protection system 100 also includes second switch 34.The negative pole of the battery case 10 is by described the
Two switches 34 are connected with the first interface 40, and the second switch 34 is connected with the BCU 30.The BCU 30 is additionally operable to
It is more than institute more than total voltage Vbp of second reference value or the battery case 10 in the ceiling voltage Vb of the cell B1
When stating four reference values, control the second switch 34 and disconnect.
In the present embodiment, first reference value Vref1, second reference value, the 3rd reference value Vref3
And the concrete numerical value of the 4th reference value can be adjusted accordingly according to practical situation.First reference value Vref1 is less than
Second reference value, second reference value is less than the 3rd reference value Vref3, and the 3rd reference value Vref3 is less than
4th reference value.
The over-charging of battery protection system 100 also includes insulation monitoring module 60.The insulation monitoring module 60 and each
BMU 20 and the second switch 34 are connected, and are connected with the positive pole and negative pole of the battery case 10 by bus 66.Each BMU
20 are additionally operable to the signal output for collecting to the insulation monitoring module 60.The BCU 30 is additionally operable to periodically to described
Insulation monitoring module 60 sends total voltage Vbp of the battery case 10.The insulation monitoring module 60 is used in Preset Time
During total voltage Vbp of the battery case 10 for being not received by the transmissions of the BCU 30, list is picked out according to the signal for receiving
The ceiling voltage Vb of body battery B1, and total voltage Vbp of the battery case 10 is detected by the bus 66, and by the monomer
The ceiling voltage Vb of battery B1 compares with first reference value Vref1, also by total voltage Vbp of the battery case 10 with it is described
3rd reference value Vref3 compares.The insulation monitoring module 60 is additionally operable to be more than in the ceiling voltage Vb of the cell B1
When total voltage Vbp of first reference value Vref1 or the battery case 10 is more than three reference value Vref3, institute is controlled
State second switch 34 to disconnect.It is appreciated that the insulation monitoring module 60 is additionally operable to detect the battery case 10 relative to car body
Insulation resistance value.
Fig. 2 is referred to, Fig. 2 is the circuit diagram of second switch 34 in Fig. 1.The second switch 34 include catalyst 35, the
The one son switch K2 of switch K1 and second, the catalyst 35 includes the son switch K3 of coil L1 and the 3rd.The of the coil L1
One end is connected with power supply V1, and second end of the coil L1 is connect by the described second son switch K2 and the first son switch K1
Ground.The first end of the 3rd son switch K3 is connected with the negative pole of the battery case 10.Second end of the 3rd son switch K3
It is connected with the charging pile 50 by the first interface 40.The first son switch K1 is connected with the BCU 30, and described the
Two son switch K2 are connected with the insulation monitoring module 60.The BCU 30 is additionally operable to the ceiling voltage in the cell B1
When Vb is more than four reference value more than total voltage Vbp of second reference value or the battery case 10, described the is controlled
One son switch K1 disconnects.Now, no current flows through in the coil L1, and the 3rd son switch K3 disconnects, the second switch
34 disconnect.The insulation monitoring module 60 is additionally operable to be more than first reference value in the ceiling voltage Vb of the cell B1
When total voltage Vbp of Vref1 or described battery cases 10 is more than three reference value Vref3, the second son switch K2 is controlled
Disconnect.Now, no current flows through in the coil L1, and the 3rd son switch K3 disconnects, and the second switch 34 disconnects.
Fig. 3 is referred to, Fig. 3 is the circuit diagram of another embodiment of insulation monitoring module 60 in Fig. 1.The Insulation monitoring mould
Block 60 includes first comparator U1 and the second comparator U2.The first input end of first comparator U1 receives the monomer electricity
The ceiling voltage Vb of pond B1, the second input reception first reference value Vref1 of first comparator U1, described first
The outfan of comparator U1 is connected with the described second son switch K2.The first input end of the second comparator U2 receives the electricity
Total voltage Vbp of pond case 10, second input of the second comparator U2 receives the 3rd reference value Vref3, and described the
The outfan of two comparator U2 is connected with the described second son switch K2.When the ceiling voltage Vb of the cell B1 is more than described
During the first reference value Vref1, outfan output signal control the second son switch K2 of first comparator U1 disconnects.When
When total voltage Vbp of the battery case 10 is more than three reference value Vref3, the second comparator U2 output control signals
Control the second son switch K2 to disconnect.
Referring to Fig. 1, the over-charging of battery protection system 100 also include communication module 70, remote control terminal 80 and
3rd switch 72.The communication module 70 and each BMU 20 and the 3rd switch 72 are connected, and with the remote control terminal
80 communications.The negative pole of the battery case 10 is connected by the described 3rd switch 72 with the first interface 40.Each BMU 20 is also
For giving the communication module 70 by the signal output for collecting.The communication module 70 be used for will the signal transmission that receive to
The remote control terminal 80.The remote control terminal 80 is used to pick out the ceiling voltage of cell B1 according to the signal for receiving
Vb simultaneously calculates total voltage Vbp of the battery case 10, and the ceiling voltage Vb of the cell B1 and described first is joined
Examine value Vref1 to compare, also compare total voltage Vbp of the battery case 10 with the 3rd reference value Vref3.The long-range control
End processed 80 is additionally operable to be more than first reference value Vref1 or the battery case 10 in the ceiling voltage Vb of the cell B1
Total voltage Vbp be more than three reference value Vref3 when, by the communication module 70 control it is described 3rd switch 72 break
Open.
Fig. 4 is referred to, Fig. 4 is the theory diagram of another embodiment of communication module 70 in Fig. 1.The communication module 70 is wrapped
Include positioning unit 76 and communication unit 78.The communication unit 78 is connected with the positioning unit 76 and each BMU 20, and with
The remote control terminal 80 is communicated.The positioning unit 76 is used to position the battery case 10, and framing signal is led to
Cross the communication unit 78 and be transferred to the remote control terminal 80.Each BMU 20 is additionally operable to the signal output that will be collected to institute
State communication unit 78.The communication unit 78 is used for the signal transmission for receiving to the remote control terminal 80.It is described long-range
Control end 80 is used to pick out the ceiling voltage Vb of cell B1 and calculate the battery case 10 according to the signal for receiving
Total voltage Vbp, and the ceiling voltage Vb of the cell B1 is compared with first reference value Vref1, also by the electricity
Total voltage Vbp of pond case 10 compares with the 3rd reference value Vref3.The remote control terminal 80 is additionally operable in monomer electricity
The ceiling voltage Vb of pond B1 is more than the described 3rd more than total voltage Vbp of first reference value Vref1 or the battery case 10
During reference value Vref3, notify related personnel according to it is described locate signal to corresponding place make it is described 3rd switch 72 disconnect.
In the present embodiment, the communication unit 78 includes that (General Packet Radio Service lead to GPRS
With packet wireless service technology), second filial generation mobile communication technology (2G), third generation mobile technology (3G) and forth generation movement
One kind in mechanics of communication (4G).The positioning unit 76 includes GPS (Global Positioning System, global location
System).
Fig. 5 is referred to, Fig. 5 is the schematic diagram of set of cells 12 in Fig. 1.Each set of cells 12 includes that multiple first parallel connections are connected again
Cell B1 and be connected between the cell B1 of multiple series connection the 4th switch 16.4th switch 16 and phase
The BMU 20 for answering is connected.The BMU 20 is used in the voltage of cell B1 in gathering the set of cells 12, and control is described
4th switch 16 is closed.The BMU 20 is additionally operable to be more than first reference value in the voltage of the cell B1 for collecting
During Vref1, control the 4th switch 16 and disconnect.
Referring to Fig. 1, the over-charging of battery protection system 100 also includes the 5th switch 38 and second interface 42.Institute
The positive pole for stating battery case 10 is also connected by the described 5th switch 38 with the second interface 42, and the negative pole of the battery case 10 is also
It is connected with the second interface 42.The BCU 30 is connected with the described 5th switch 38 and the second interface 42.Described second
Interface 42 is used to connect the charging pile 50.The charging pile 50 is additionally operable to by the second interface 42 and the 5th switch
38 charge to the battery case 10.The BCU 30 is additionally operable to be more than described first in the ceiling voltage Vb of the cell B1
Reference value Vref1 and less than second reference value or the battery case 10 total voltage Vbp be more than the 3rd reference value
Vref3 and during less than four reference value, controls the charging pile 50 and stops to the battery by the second interface 42
Case 10 charges, and the switch of control the 5th 38 disconnects after the time delay.
In the present embodiment, the first switch 32 is catalyst or relay, and the 5th switch 38 is catalyst
Or relay.Each BMU 20 by CAN (CAN (Controller Area Network, controller local area network) buses 90 with
The BCU 30, the insulation monitoring module 60 and the communication module 70 are connected.The BCU 30 is by the CAN 90
It is connected with the first interface 40 and the second interface 42.The first interface 40 and the second interface 42 can be charging
Charging inlet on socket or charging gun.The first interface 40 and the second interface 42 can every time only one of which with it is described
Charging pile 50 is connected, it is also possible to which two are connected with the charging pile 50 simultaneously.The remote control terminal 80 includes computer and/or clothes
Business device and/or car networking.In other embodiments, the quantity of the interface that the over-charging of battery protection system 100 includes can root
Adjust accordingly according to practical situation, can be one, three, four etc., each interface is by a switch and the electricity
The positive pole of pond case 10 and the BCU 30 are connected.
The operation principle of over-charging of battery protection system 100 of the present invention will be illustrated below.
When the first interface 40 is connected with the charging pile 50, the charging pile 50 by the first interface 40,
The first switch 32, the second switch 34 and the 3rd switch 72 charge to the battery case 10.Each BMU 20 is controlled
The 4th switch 16 made in corresponding set of cells 12 is closed, and gathers the voltage of cell B1 in corresponding set of cells 12, and
The BCU 30, the insulation monitoring module 60 and the communication module 70 are given by the signal output for collecting, will also be collected
The voltage of each cell B1 compare with first reference voltage.When the voltage of a certain cell B1 is more than described the
During one reference value Vref1, the BMU 20 controls corresponding 4th switch 16 and disconnects, and is returned with the charging for disconnecting the battery case 10
Road, the battery case 10 is not recharged, so as to effectively prevent over-charging of battery.
The BCU 30 picks out monomer electricity after the signal for receiving each output of BMU 20 according to the signal for receiving
The ceiling voltage Vb of pond B1 simultaneously calculates total voltage Vbp of the battery case 10, and by the ceiling voltage of the cell B1
Vb compares with first reference value Vref1 and second reference value, also by total voltage Vbp of the battery case 10 with it is described
3rd reference value Vref3 and the 4th reference value compare, also by total voltage Vbp of the battery case 10 for calculating periodically
Be sent to the insulation monitoring module 60.
When the ceiling voltage Vb of the cell B1 is more than first reference value Vref1 and less than the described second reference
Total voltage Vbp of value or the battery case 10 shows more than the 3rd reference value Vref3 and during less than four reference value
Battery is it is possible that overcharge phenomenon.The BCU 30 is sent by the first interface 40 and stops charging instruction to the charging
Stake 50, the charging pile 50 receives and stops being charged to the battery case 10 after the stopping charging instruction.The BCU 30 exists
Control the first switch 32 after time delay to disconnect, to disconnect the charge circuit of the battery case 10, so as to effectively prevent electricity
Pond overcharges.
The charging pile 50 is exported and is gradually lowered to the electric current of the battery case 10 in the delay time, when reaching
When stating delay time, the charging pile 50 is exported and drops to safety range to the electric current of the battery case 10, for example, less than 5A.
Now, the BCU 30 controls the first switch 32 and disconnects, and can prevent the first switch 32 from disconnecting the drawing that moment causes
Arc phenomenon, such that it is able to avoid because phenomenon of arc discharge causes contact oxidation, the carbonization of the first switch 32, or even contact to glue and wait indefinitely
Situation, and then the service life of the first switch 32 is extended, more improve the safety of the over-charging of battery protection system 100
Property and reliability.In the present embodiment, the time length of the time delay can be adjusted according to practical situation, the electric current
Safety range can also be adjusted accordingly according to practical situation.
When the ceiling voltage Vb of the cell B1 is more than second reference value or the total voltage of the battery case 10
When Vbp is more than four reference value, show that battery will appear from overcharging phenomenon, need to take an immediate action.The BCU 30
Control the first son switch K1 to disconnect, no current flows through in the coil L1, the 3rd son switch K3 disconnects, described second
Switch 34 disconnects, and the battery case 10 stops charging, so as to prevent over-charging of battery in time and effectively to the battery case
Battery in 10 has carried out overcharging protection.
The insulation monitoring module 60 receives the signal of each output of BMU 20, and receives the periodicity of the BCU 30
Total voltage Vbp of the battery case 10 for sending.When the insulation monitoring module 60 is not received by the BCU in Preset Time
During total voltage Vbp of 30 battery cases 10 for sending, show that the BCU 30 can there occurs failure, i.e. the insulation inspection
Surveying module 60 can monitor the state of the BCU 30.The insulation monitoring module 60 picks out monomer according to the signal for receiving
The ceiling voltage Vb of battery B1, and total voltage Vbp of the battery case 10 is detected by the bus 66, and the monomer is electric
The ceiling voltage Vb of pond B1 compares with first reference value Vref1, also by total voltage Vbp of the battery case 10 and described
Three reference values Vref3 compare.When the ceiling voltage Vb of the cell B1 is more than first reference value Vref1 or the electricity
When total voltage Vbp of pond case 10 is more than three reference value Vref3, the insulation monitoring module 60 is by its internal software
Control the second son switch K2 to disconnect, no current flows through in the coil L1, the 3rd son switch K3 disconnects, described second
Switch 34 disconnects, and the battery case 10 stops charging, so as to carry out over-charging of battery protection in time.
Software failure inside the insulation monitoring module 60, it is impossible to control the second son switch K2 and disconnect
When, first comparator U1 and the second comparator U2 start working.When the ceiling voltage Vb of the cell B1 it is big
When first reference value Vref1, outfan output signal control the second son switch K2 of first comparator U1
Disconnect.When total voltage Vbp of the battery case 10 is more than three reference value Vref3, the second comparator U2 outputs
Control signal control the second son switch K2 disconnects.It follows that the insulation monitoring module 60 is in software failure,
Over-charging of battery protection can be carried out with hardware (such as first comparator U1 and the second comparator U2), it is achieved thereby that
The double protection functions of software and hardware.
The signal transmission for receiving is given described by the communication module 70 after the signal for receiving each output of BMU 20
Remote control terminal 80.The remote control terminal 80 is picked out the ceiling voltage Vb of cell B1 and is calculated according to the signal for receiving
Go out total voltage Vbp of the battery case 10, and by the ceiling voltage Vb of the cell B1 and first reference value Vref1
Relatively, also total voltage Vbp of the battery case 10 is compared with the 3rd reference value Vref3.When the cell B1's
Ceiling voltage Vb is more than the 3rd reference value more than total voltage Vbp of first reference value Vref1 or the battery case 10
During Vref3, the remote control terminal 80 sends a signal to the communication module 70, and the communication module 70 receives the signal
After control it is described 3rd switch 72 disconnect, the battery case 10 stop charge, so as to carry out over-charging of battery protection in time.Thus
Understand, the remote control terminal 80 hinders for some reason in the BMU 20, the BCU30 and the insulation monitoring module 60 cannot be right
When the battery case 10 carries out overcharging protection, the battery case 10 can be carried out to overcharge protection, it is achieved thereby that multiple overcharge
The function of protection, and then further increase the safety of the over-charging of battery protection system 100.
Referring to Fig. 4, in another embodiment, the communication module 70 includes communication unit 78 and positioning unit
76.76 pairs of battery cases 10 of the positioning unit are positioned, and framing signal is transferred to by the communication unit 78
The remote control terminal 80.The communication unit 78 receives the signal of each BMU 20 output, and by the signal transmission for receiving
To the remote control terminal 80.When the ceiling voltage Vb of the cell B1 is more than first reference value Vref1 or described
Total voltage Vbp of battery case 10 be more than three reference value Vref3 when, the remote control terminal 80 notify related personnel according to
It is described locate signal to corresponding place make it is described 3rd switch 72 disconnect, the battery case 10 stop charge, so as to enter in time
Over-charging of battery protection is gone.It follows that the mode that the remote control terminal 80 controls the 3rd switch 72 disconnection has two kinds,
The first is to control the 3rd switch 72 by the communication module 70 to disconnect, and the second way is to notify related personnel to now
Field is gone to disconnect the 3rd switch 72.
When the second interface 42 is connected with the charging pile 50, the charging pile 50 by the second interface 42,
The second switch 34, the 3rd switch 72 and the 5th switch 38 charge to the battery case 10.Each BMU 20, institute
State BCU 30, the insulation monitoring module 60,80 pairs of battery cases 10 of the communication module 70 and the remote control terminal to enter
Row overcharges the operation principle of protection, carries out overcharging guarantor when being connected with the charging pile 50 with the first interface 40 recited above
The operation principle of shield is similar, and this is no longer going to repeat them.
It is appreciated that each BMU 20 can also gather in corresponding set of cells 12 electric current of cell B1 and corresponding
Set of cells 12 temperature, the over-charging of battery protection system 100 can also carry out overcurrent protection and mistake to the battery case 10
Temperature protection.100 pairs of battery cases 10 of the over-charging of battery protection system carry out the operation principle of overcurrent protection and overheat protector
Similar to the operation principle that 100 pairs of battery cases 10 of the over-charging of battery protection system carry out overcharging protection, here is not another
One repeats.
The present invention is more than first reference value by the BCU 30 in the ceiling voltage Vb of the cell B1
Vref1 and less than second reference value or the battery case 10 total voltage Vbp more than the 3rd reference value Vref3 and little
When four reference value, control the charging pile 50 and stop being charged to the battery case 10, and control first after the delay
Switch 32 disconnects, so as to effectively prevent over-charging of battery, and from the voltage and total electricity of the battery case 10 of cell B1
Pressure two aspects of Vbp have carried out overcharging protection to the battery in the battery case 10, and avoid the contact of the first switch 32
Viscous dead situation occurs, and then improves safety and the reliability of the over-charging of battery protection system 100.
The present invention is also more than second reference value by the BCU 30 in the ceiling voltage Vb of the cell B1
Or total voltage Vbp of the battery case 10 is when being more than four reference value, controls the second switch 34 and disconnect, so as to enter one
Step prevents over-charging of battery, and to described in terms of the voltage of cell B1 and total voltage Vbp two of the battery case 10
Battery in battery case 10 has carried out dual overcharging protection.
The present invention also monitors the state of the BCU 30 by the insulation monitoring module 60, and occurs in the BCU 30
During failure, both the battery in battery case 10 can be carried out by software overcharging protection, again can be by hardware to battery case
Battery in 10 has carried out overcharging protection, it is achieved thereby that software and the dual of hardware cross charging protection function.
The present invention also switchs 32,34,72,16,38 by arranging described first to the 5th, to coordinate described each BMU
20th, the BCU 30, the insulation monitoring module 60,80 pairs of battery cases of the communication module 70 and the remote control terminal
Battery in 10 carry out it is multiple overcharge protection so that the over-charging of battery protection system 100 is in some elements or functional module
When breaking down, still effectively the battery in battery case 10 can be carried out to overcharge protection.
The present invention is not restricted to described in description and embodiments, therefore can for the personnel of familiar field
Additional advantage and modification are easily realized, therefore in the spirit of the general concept limited without departing substantially from claim and equivalency range
In the case of scope, the present invention be not limited to specific details, representational equipment and shown here as with description diagram show
Example.
Claims (10)
1. a kind of over-charging of battery protection system, it is characterised in that：The over-charging of battery protection system includes battery case, multiple batteries
Administrative unit, battery control unit, first switch, first interface and charging pile, the battery case includes the battery of multiple series connection
Group, the positive pole of the battery case is connected by the first switch with the first interface, the negative pole of the battery case with it is described
First interface is connected, and each battery management unit set of cells corresponding with and the battery control unit are connected, the electricity
Pond control unit is connected with the first switch and the first interface, and the first interface is used to connect the charging pile, institute
Charging pile is stated for charging to the battery case by the first interface and the first switch, each battery management unit is used
In the voltage for gathering cell in corresponding set of cells, and the battery control unit, institute are given by the signal output for collecting
Battery control unit is stated for the ceiling voltage of cell being picked out and calculating the battery case according to the signal that receives
Total voltage, and the ceiling voltage of the cell is compared with the first reference value and the second reference value, also by the battery
The total voltage of case compares with the 3rd reference value and the 4th reference value, and the battery control unit is additionally operable in the cell
Ceiling voltage more than first reference value and less than second reference value or the battery case total voltage more than described the
Three reference values and during less than four reference value, control the charging pile and stop being charged to the battery case, and after the delay
Control first switch disconnects.
2. over-charging of battery protection system as claimed in claim 1, it is characterised in that：The over-charging of battery protection system also includes
Second switch, the negative pole of the battery case is connected by the second switch with the first interface, the second switch and institute
State battery control unit to be connected, the battery control unit is additionally operable to be more than described second in the ceiling voltage of the cell
When the total voltage of reference value or the battery case is more than four reference value, controls the second switch and disconnect.
3. over-charging of battery protection system as claimed in claim 2, it is characterised in that：The over-charging of battery protection system also includes
Insulation monitoring module, the insulation monitoring module is connected with each battery management unit and the second switch, and by bus
It is connected with the positive pole and negative pole of the battery case, each battery management unit is additionally operable to the signal output for collecting to described exhausted
Edge detection module, the battery control unit is additionally operable to periodically send the total of the battery case to the insulation monitoring module
Voltage, the insulation monitoring module is used to be not received by the battery that the battery control unit sends in Preset Time
During the total voltage of case, the ceiling voltage of cell is picked out according to the signal for receiving, and it is described by bus detection
The total voltage of battery case, and the ceiling voltage of the cell is compared with first reference value, also by the battery case
Total voltage compare with the 3rd reference value, the insulation monitoring module is additionally operable to big in the ceiling voltage of the cell
When the total voltage of first reference value or the battery case is more than three reference value, controls the second switch and break
Open.
4. over-charging of battery protection system as claimed in claim 3, it is characterised in that：The second switch include catalyst, the
One son switch and the second son switch, the catalyst includes coil and the 3rd son switch, first end and the power supply phase of the coil
Even, the second end of the coil is by the described second son switch and the first son switch ground connection, and the of the 3rd son switch
One end is connected with the negative pole of the battery case, and the second end of the 3rd son switch is by the first interface and the charging pile
It is connected, the first son switch is connected with the battery control unit, second son is switched and the insulation monitoring module phase
Even, the battery control unit is additionally operable to be more than second reference value or the battery in the ceiling voltage of the cell
When the total voltage of case is more than four reference value, controls first son and switch off, no current flows through in the coil, institute
State the 3rd son to switch off, the second switch disconnects, the insulation monitoring module is additionally operable to the highest in the cell
When voltage is more than three reference value more than the total voltage of first reference value or the battery case, described second is controlled sub
Switch off, no current flows through in the coil, the 3rd son is switched off, the second switch disconnects.
5. over-charging of battery protection system as claimed in claim 4, it is characterised in that：The insulation monitoring module includes the first ratio
Compared with device and the second comparator, the first input end of the first comparator receives the ceiling voltage of the cell, and described the
Second input of one comparator receives first reference value, the outfan of the first comparator and the described second son switch
It is connected, the first input end of second comparator receives the total voltage of the battery case, the second of second comparator is defeated
Enter end and receive the 3rd reference value, the outfan of second comparator is connected with the described second son switch, when the monomer
When the ceiling voltage of battery is more than first reference value, the outfan output signal control described second of the first comparator
Son is switched off, when the total voltage of the battery case is more than three reference value, the second comparator output control letter
Number control second son is switched off.
6. over-charging of battery protection system as claimed in claim 1, it is characterised in that：The over-charging of battery protection system also includes
Communication module, remote control terminal and the 3rd switch, the communication module and each battery management unit and the 3rd switch phase
Even, and with the remotely control end communication, the negative pole of the battery case is connected by the described 3rd switch with the first interface,
Each battery management unit is additionally operable to the signal output for collecting to the communication module, and the communication module is used to receive
The signal transmission for arriving to the remote control terminal, the remote control terminal to be used to pick out cell according to the signal for receiving
Ceiling voltage simultaneously calculates the total voltage of the battery case, and by the ceiling voltage of the cell and first reference value
Relatively, also the total voltage of the battery case is compared with the 3rd reference value, the remote control terminal is additionally operable in the list
When the ceiling voltage of body battery is more than three reference value more than the total voltage of first reference value or the battery case, lead to
Cross the communication module control the described 3rd to switch off.
7. over-charging of battery protection system as claimed in claim 1, it is characterised in that：The over-charging of battery protection system also includes
Communication module, remote control terminal and the 3rd switch, the communication module includes positioning unit and communication unit, the communication unit
Be connected with the positioning unit and each battery management unit, and with the remotely control end communication, the negative pole of the battery case
It is connected with the first interface by the described 3rd switch, the positioning unit is used to position the battery case, and will
Framing signal is transferred to the remote control terminal by the communication unit, and each battery management unit is additionally operable to collect
Signal output is used for the signal transmission that will be received to the remote control terminal, institute to the communication unit, the communication unit
Remote control terminal is stated for picking out the ceiling voltage of cell and calculating the total of the battery case according to the signal for receiving
Voltage, and the ceiling voltage of the cell is compared with first reference value, also by the total voltage of the battery case with
3rd reference value compares, and the remote control terminal is additionally operable to join more than described first in the ceiling voltage of the cell
When examining the total voltage of value or the battery case more than three reference value, notify that related personnel locates signal to phase according to described
The place answered makes the described 3rd to switch off.
8. over-charging of battery protection system as claimed in claim 1, it is characterised in that：Each set of cells includes multiple first parallel connections again
The cell of series connection and the 4th switch being connected between the cell of multiple series connection, it is described 4th switch with it is corresponding
Battery management unit is connected, and the battery management unit is used in the voltage of cell in gathering the set of cells, control
The 4th switch closure, the battery management unit is additionally operable to join more than described first in the voltage of the cell for collecting
When examining value, control the described 4th is switched off.
9. over-charging of battery protection system as claimed in claim 1, it is characterised in that：The over-charging of battery protection system also includes
5th switch and second interface, the positive pole of the battery case is also connected by the described 5th switch with the second interface, described
The negative pole of battery case is also connected with the second interface, and the battery control unit also connects with the described 5th switch and described second
Mouthful it is connected, the second interface is used to connect the charging pile, the charging pile is additionally operable to by the second interface and described
5th switch give the battery case charge, the battery control unit be additionally operable to the cell ceiling voltage be more than institute
State the first reference value and be more than the 3rd reference value less than the total voltage of second reference value or the battery case and be less than
During four reference value, control the charging pile and stop being charged to the battery case, and control the 5th is opened after the time delay
Shut-off is opened.
10. over-charging of battery protection system as claimed in claim 9, it is characterised in that：The first switch be catalyst or after
Electrical equipment, the 5th switch is catalyst or relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611241325.4A CN106684482A (en) | 2016-12-29 | 2016-12-29 | Battery overcharge protection system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611241325.4A CN106684482A (en) | 2016-12-29 | 2016-12-29 | Battery overcharge protection system |
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| CN106684482A true CN106684482A (en) | 2017-05-17 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611241325.4A Pending CN106684482A (en) | 2016-12-29 | 2016-12-29 | Battery overcharge protection system |
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| CN109617186A (en) * | 2018-12-31 | 2019-04-12 | 常州车之翼动力科技有限公司 | The anti-overcharge structure of BMU battery management system hardware |
| CN110497802A (en) * | 2018-05-16 | 2019-11-26 | 郑州宇通客车股份有限公司 | A kind of electric car and one key stop charging unit and method |
| US10714957B1 (en) | 2019-09-03 | 2020-07-14 | Mazen Obeid | Charge state control system and device |
| CN111527664A (en) * | 2018-03-01 | 2020-08-11 | 株式会社村田制作所 | Battery pack |
| WO2021008036A1 (en) * | 2019-07-17 | 2021-01-21 | 天佑电器（苏州）有限公司 | Charging control device |
| CN112615042A (en) * | 2020-11-30 | 2021-04-06 | 上海航天电源技术有限责任公司 | Anti-overcharging battery pack device |
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Application publication date: 20170517 |