CN209046314U - A kind of 7 section lithium battery pack charge-discharge control circuits - Google Patents

A kind of 7 section lithium battery pack charge-discharge control circuits Download PDF

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Publication number
CN209046314U
CN209046314U CN201821954978.1U CN201821954978U CN209046314U CN 209046314 U CN209046314 U CN 209046314U CN 201821954978 U CN201821954978 U CN 201821954978U CN 209046314 U CN209046314 U CN 209046314U
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resistance
connection
battery
chip
mcu
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涂建远
章进武
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Xiamen Juyan Electronic Technology Co Ltd
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Xiamen Juyan Electronic Technology Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The utility model belongs to a kind of 7 section lithium battery pack charge-discharge control circuits, including MCU control chip, variable connector control chip CD4051B, rechargeable battery set circuit, temperature sensing circuit and low power consumpting controling circuit.The utility model has multiple batteries charge and discharge electro-detection control function, sets that structure is simple, cost is smaller, good reliability.Secondly, the temperature during charging and discharging lithium battery can be detected by thermistor, safe management of charging and discharging is realized.Finally, low-power consumption mode can also be entered when not needing work in such a way that MCU controls battery charging and discharging, reawaked when needing to discharge or charge.Wake-up mode, which has access load or allows MCU to exit low-power consumption mode when accessing charger, to be discharged or is charged, saved electric energy.

Description

A kind of 7 section lithium battery pack charge-discharge control circuits
Technical field
The utility model belongs to technical field of lithium batteries, more particularly to a kind of 7 section lithium battery pack charge-discharge control circuits.
Background technique
The realization of charging and discharging lithium battery control circuit controls charging and discharging lithium battery, existing charging and discharging lithium battery control Circuit only detects charging and discharging lithium battery situation all the way, even if having multiple batteries charge and discharge electro-detection control function, design is multiple It is miscellaneous, cost is larger, poor reliability.Secondly, the temperature during charging and discharging lithium battery is also reflect lithium battery security situation one Item important indicator, but existing charging and discharging lithium battery control circuit does not have temperature detecting function.Finally, existing lithium battery fills Discharge circuit does not have power managed function, and whether either battery accesses charger or load all in normal operating conditions, Power consumption is larger.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of 7 section lithium battery pack charge-discharge control circuits, with solution Certainly the deficiencies in the prior art.
The technical solution that the utility model solves above-mentioned technical problem is as follows: 7 section lithium battery pack charge and discharge control electricity of one kind Road, MCU controls chip, variable connector controls chip CD4051B, and MCU control 5 foot of chip passes through three pole of resistance R46 connection The collector of pipe Q12, the partial pressure end of the series connection bleeder circuit of base stage connection resistance R48, R47 composition of the triode Q12, institute State the emitter ground connection of triode Q12, the resistance R48 connection charge power supply, resistance R47 ground connection;The MCU controls chip 4 Foot connects resistance R1, three pole by resistance R7 connecting triode Q3 base stage between the triode Q3 base stage and emitter The collector of pipe Q3 passes through resistance R4, the R5 being sequentially connected in series and connects metal-oxide-semiconductor Q4 grid, and end is connected in series also in described resistance R4, R5 By resistance R3 connection charge power supply, the metal-oxide-semiconductor Q4 drain electrode connection diode D4 cathode, the diode D4 anode connection is filled Power supply, the metal-oxide-semiconductor Q4 source electrode connect rechargeable battery set power input BAT+;The rechargeable battery set include metal-oxide-semiconductor Q5, Q6, Q7, Q8, Q9, Q10, Q11, metal-oxide-semiconductor Q5, Q6, Q7, Q8, Q9, Q10, Q11 grid pass through resistance R13 connection MCU control 2 foot of coremaking piece, described metal-oxide-semiconductor Q5, Q6, Q7, Q8, Q9, Q10, Q11 drain electrode be separately connected resistance R6, R7, R8, R9, R10, R11, The one end R12, the resistance R6 other end connection rechargeable battery set power input BAT+ and battery BT7 anode, the resistance The R7 other end connects battery BT6 anode and battery BT7 cathode, the resistance R8 other end connection battery BT5 anode and electricity Pond BT6 cathode, the resistance R9 other end connection battery BT4 anode and battery BT5 cathode, the resistance R10 other end connect Battery BT3 anode and battery BT4 cathode, the resistance R11 other end connection battery BT2 anode and battery BT3 cathode are connect, The resistance R12 other end connection battery BT1 anode and battery BT2 cathode, the battery BT1 cathode connect rechargeable battery set Power input BAT-, the source electrode of described metal-oxide-semiconductor Q5, Q6, Q7, Q8, Q9, Q10, Q11 be separately connected resistance R14, R15, R16, The one end R17, R18, R19, R20, resistance R14, R15, R16, R17, R18, R19, R20 other end ground connection, the resistance The one end R14, R15, R16, R17, R18, R19, R20 is also connected by resistance R22, R24, R26, R28, R30, R32, R34 respectively 13,14,15,5,4,2,1 foot of switch control chip CD4051B.
Further, 12 feet of the switch control chip CD4051B control the 13 of chip by resistance R35 connection MCU Foot, 12 feet of the switch control chip CD4051B are also connected with the one end thermistor NTC, the one end capacitor C9, the thermistor The NTC other end connects 5V power supply, the capacitor C9 other end ground connection.
Further, 3 feet of the MCU control chip pass through the grid of resistance R44 connection metal-oxide-semiconductor Q2, the company of metal-oxide-semiconductor Q2 The anode of diode D1 is connect, the cathode of shown diode D1 connects battery feeder ear, and the diode D1 is also parallel with load and connects Enter end, the source electrode of the metal-oxide-semiconductor Q2 connects the one end resistance R49, R50, and the resistance R49 other end is grounded, and the resistance R50 is another One end connects 18 feet of MCU control chip, the base stage of triode Q13 and the one end capacitor C13, another termination of capacitor C13 Ground, the collector of triode Q13 control 19 feet of chip by resistance R62 connection MCU, and the emitter of the triode Q13 connects Ground.
Further, the charge power supply is direct current 30V.
Further, 17,16,15,14,11 feet of the MCU control chip are all connected with variable connector control chip CD4051B。
The beneficial effects of the utility model are: the utility model has multiple batteries charge and discharge electro-detection control function, set Structure is simple, cost is smaller, good reliability.Secondly, the temperature during charging and discharging lithium battery can be detected by thermistor, Realize safe management of charging and discharging.Finally, can also enter when not needing work in such a way that MCU controls battery charging and discharging low Power consumption mode is reawaked when needing to discharge or charge.Wake-up mode allows MCU to move back when having access to load or accessing charger Low-power consumption mode is discharged or is charged out, saves electric energy.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described.In all the appended drawings, similar Element or part are generally identified by similar appended drawing reference.In attached drawing, each element or part might not be according to actual ratios It draws.
Fig. 1 is the utility model circuit diagram.
Specific embodiment
It is described in detail below in conjunction with embodiment of the attached drawing to technical solutions of the utility model.Following embodiment is only For clearly illustrating the technical solution of the utility model, therefore it is only used as example, and it is originally practical to cannot be used as a limitation limitation Novel protection scope.
As shown in Figure 1, a kind of 7 section lithium battery pack charge-discharge control circuits, MCU controls chip, variable connector controls chip CD4051B, MCU control 5 foot of chip pass through the collector of resistance R46 connecting triode Q12, the base of the triode Q12 Pole connects the partial pressure end of the series connection bleeder circuit of resistance R48, R47 composition, the emitter ground connection of the triode Q12, the electricity Hinder R48 connection charge power supply, resistance R47 ground connection;MCU control 4 foot of chip passes through resistance R7 connecting triode Q3 base stage, institute The collector for stating connection resistance R1, the triode Q3 between triode Q3 base stage and emitter passes through the resistance being sequentially connected in series R4, R5 connect metal-oxide-semiconductor Q4 grid, and described resistance R4, R5 are connected in series end and also pass through resistance R3 connection charge power supply, the MOS Pipe Q4 drain electrode connection diode D4 cathode, the diode D4 anode connect charge power supply, the metal-oxide-semiconductor Q4 source electrode connection charging Battery power input terminal BAT+;The rechargeable battery set includes metal-oxide-semiconductor Q5, Q6, Q7, Q8, Q9, Q10, Q11, the metal-oxide-semiconductor Q5, Q6, Q7, Q8, Q9, Q10, Q11 grid pass through resistance R13 connection MCU control 2 foot of chip, the metal-oxide-semiconductor Q5, Q6, Q7, Q8, Q9, Q10, Q11 drain electrode are separately connected the one end resistance R6, R7, R8, R9, R10, R11, R12, the resistance R6 other end connection Rechargeable battery set power input BAT+ and battery BT7 anode, the resistance R7 other end connection battery BT6 anode and electricity Pond BT7 cathode, the resistance R8 other end connection battery BT5 anode and battery BT6 cathode, the resistance R9 other end connection Battery BT4 anode and battery BT5 cathode, the resistance R10 other end connection battery BT3 anode and battery BT4 cathode, institute Resistance R11 other end connection battery BT2 anode and battery BT3 cathode are stated, the resistance R12 other end connection battery BT1 is just Pole and battery BT2 cathode, the connection of battery BT1 cathode the rechargeable battery set power input BAT-, the metal-oxide-semiconductor Q5, Q6, The source electrode of Q7, Q8, Q9, Q10, Q11 are separately connected the one end resistance R14, R15, R16, R17, R18, R19, R20, the resistance R14, R15, R16, R17, R18, R19, R20 other end ground connection, the one end described resistance R14, R15, R16, R17, R18, R19, R20 Also respectively by resistance R22, R24, R26, R28, R30, R32, R34 connection switch control chip CD4051B 13,14,15,5, 4,2,1 foot.
In the present embodiment, 12 feet of the switch control chip CD4051B control chip by resistance R35 connection MCU 13 feet, 12 feet of the switch control chip CD4051B are also connected with the one end thermistor NTC, the one end capacitor C9, the temperature-sensitive electricity It hinders the NTC other end and connects 5V power supply, the capacitor C9 other end ground connection.
In the present embodiment, 3 feet of the MCU control chip pass through the grid of resistance R44 connection metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q2's The anode of diode D1 is connected, the cathode of shown diode D1 connects battery feeder ear, and the diode D1 is also parallel with load Incoming end, the source electrode of the metal-oxide-semiconductor Q2 connect the one end resistance R49, R50, the resistance R49 other end ground connection, the resistance R50 The other end connects 18 feet of MCU control chip, the base stage of triode Q13 and the one end capacitor C13, the capacitor C13 other end Ground connection, the collector of triode Q13 control 19 feet of chip, the emitter of the triode Q13 by resistance R62 connection MCU Ground connection.
In the present embodiment, the charge power supply is direct current 30V.
In the present embodiment, 17,16,15,14,11 feet of the MCU control chip are all connected with variable connector control chip CD4051B。
The principles of the present invention are:
When charging, Q12 base stage is output to by R47, R48 partial pressure, Q12 is connected, the 5 foot voltages of MCU are pulled low, detection It is accessed to charger.Metal-oxide-semiconductor Q5, Q6, Q7, Q8, Q9, Q10, Q11 is connected in the 2 feet output high level of MCU.CD4051B passes through (such as: detection BT1 voltage, CD4051B detect sampling resistor R12, R20 by 1 foot to the every economize on electricity cell voltage of sampling resistor cycle detection Partial pressure value determine cell voltage).The voltage that CD4051B also passes through the sampling of 12 feet thermistor NTC and R35 detects battery indirectly (resistance value of thermistor NTC also changes temperature with temperature change, is determined by the variation correlativity of temperature and resistance value Battery temperature).CD4051B detects that every economize on electricity cell voltage does not overcharge, and detects that battery temperature is not too high or too low, 4 feet of MCU Switch by controlling Q3 charges the battery to control the switch of Q4: 4 feet of MCU export low level, Q3 cut-off, the grid of Q4 Extremely high level, Q4 conducting, charge power supply 30V are charged by battery pack charging section BAT+ to concatenated seven groups of battery BT7-BT1; When 4 feet of MCU export high level, Q3 conducting, the grid of Q4 is low level, and Q4 ends, and charge power supply 30V cannot pass through battery pack Charging section BAT+ charges to concatenated seven groups of battery BT7-BT1, and charging stops.In charging process, pass through CD4051B cycle detection Every economize on electricity cell voltage and battery temperature, after detecting that battery is full of or battery temperature is excessively high, charge closing through the above way.
When electric discharge, MCU is by detection access load (the 3 and 19 foot high level of MCU when low-power consumption mode), in diode D1 After load access section OUT access load in parallel, Q2 is connected, and is had its partial pressure with load on R49, is made Q13 base stage high level, Q13 is connected 19 feet and is pulled low, and 19 foot level of MCU detects load access on the contrary.And every section is still detected by CD4051B Battery does not have over-discharge or battery temperature not too high or too low, and the 3 feet output high level control Q2 conducting of MCU, battery-end passes through load Q2 → resistance R49 → ground circuit of → conducting discharges, in discharge process, the every economize on electricity cell voltage of CD4051B cycle detection, Discharge current (MCU samples the voltage of R49 by 18 feet to judge the size of electric current) and temperature, when discharge current is excessive, battery Brownout or when temperature Tai Gaotai low, electric discharge is closed in the 3 feet output low level control Q2 cut-off of MCU.
Low-power consumption mode can also be entered when not needing work in such a way that MCU controls battery charging and discharging, needed It is reawaked when electric discharge or charging.Wake-up mode have access load or access charger when allow MCU exit low-power consumption mode into Row electric discharge or charging, principle are same as above, repeat no more.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited System;Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of Technical characteristic is equivalently replaced;And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new The range of each embodiment technical solution of type, should all cover in the claim of the utility model and the range of specification.

Claims (5)

1. a kind of 7 section lithium battery pack charge-discharge control circuits, it is characterised in that: MCU controls chip, variable connector controls chip CD4051B, MCU control 5 foot of chip pass through the collector of resistance R46 connecting triode Q12, the base of the triode Q12 Pole connects the partial pressure end of the series connection bleeder circuit of resistance R48, R47 composition, the emitter ground connection of the triode Q12, the electricity Hinder R48 connection charge power supply, resistance R47 ground connection;MCU control 4 foot of chip passes through resistance R7 connecting triode Q3 base stage, institute The collector for stating connection resistance R1, the triode Q3 between triode Q3 base stage and emitter passes through the resistance being sequentially connected in series R4, R5 connect metal-oxide-semiconductor Q4 grid, and described resistance R4, R5 are connected in series end and also pass through resistance R3 connection charge power supply, the MOS Pipe Q4 drain electrode connection diode D4 cathode, the diode D4 anode connect charge power supply, the metal-oxide-semiconductor Q4 source electrode connection charging Battery power input terminal BAT+;The rechargeable battery set includes metal-oxide-semiconductor Q5, Q6, Q7, Q8, Q9, Q10, Q11, the metal-oxide-semiconductor Q5, Q6, Q7, Q8, Q9, Q10, Q11 grid pass through resistance R13 connection MCU control 2 foot of chip, the metal-oxide-semiconductor Q5, Q6, Q7, Q8, Q9, Q10, Q11 drain electrode are separately connected the one end resistance R6, R7, R8, R9, R10, R11, R12, the resistance R6 other end connection Rechargeable battery set power input BAT+ and battery BT7 anode, the resistance R7 other end connection battery BT6 anode and electricity Pond BT7 cathode, the resistance R8 other end connection battery BT5 anode and battery BT6 cathode, the resistance R9 other end connection Battery BT4 anode and battery BT5 cathode, the resistance R10 other end connection battery BT3 anode and battery BT4 cathode, institute Resistance R11 other end connection battery BT2 anode and battery BT3 cathode are stated, the resistance R12 other end connection battery BT1 is just Pole and battery BT2 cathode, the connection of battery BT1 cathode the rechargeable battery set power input BAT-, the metal-oxide-semiconductor Q5, Q6, The source electrode of Q7, Q8, Q9, Q10, Q11 are separately connected the one end resistance R14, R15, R16, R17, R18, R19, R20, the resistance R14, R15, R16, R17, R18, R19, R20 other end ground connection, the one end described resistance R14, R15, R16, R17, R18, R19, R20 Also respectively by resistance R22, R24, R26, R28, R30, R32, R34 connection switch control chip CD4051B 13,14,15,5, 4,2,1 foot.
2. a kind of 7 section lithium battery pack charge-discharge control circuit according to claim 1, it is characterised in that: the switch control 12 feet of coremaking piece CD4051B control 13 feet of chip by resistance R35 connection MCU, the switch control chip CD4051B's 12 feet are also connected with the one end thermistor NTC, the one end capacitor C9, and the thermistor NTC other end connects 5V power supply, the capacitor C9 other end ground connection.
3. a kind of 7 section lithium battery pack charge-discharge control circuit according to claim 1, it is characterised in that: the MCU control 3 feet of chip pass through the grid of resistance R44 connection metal-oxide-semiconductor Q2, the anode of the connection diode D1 of metal-oxide-semiconductor Q2, shown diode The cathode of D1 connects battery feeder ear, and the diode D1 is also parallel with load incoming end, and the source electrode of the metal-oxide-semiconductor Q2 connects electricity Hinder the one end R49, R50, the resistance R49 other end ground connection, 18 feet of the resistance R50 other end connection MCU control chip, three The base stage of pole pipe Q13 and the one end capacitor C13, the capacitor C13 other end ground connection, the collector of triode Q13 pass through resistance R62 connection MCU controls 19 feet of chip, the emitter ground connection of the triode Q13.
4. a kind of 7 section lithium battery pack charge-discharge control circuit according to claim 1, it is characterised in that: the charging electricity Source is direct current 30V.
5. a kind of 7 section lithium battery pack charge-discharge control circuit according to claim 1, it is characterised in that: the MCU control 17,16,15,14,11 feet of chip are all connected with variable connector control chip CD4051B.
CN201821954978.1U 2018-11-26 2018-11-26 A kind of 7 section lithium battery pack charge-discharge control circuits Active CN209046314U (en)

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CN201821954978.1U CN209046314U (en) 2018-11-26 2018-11-26 A kind of 7 section lithium battery pack charge-discharge control circuits

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CN201821954978.1U CN209046314U (en) 2018-11-26 2018-11-26 A kind of 7 section lithium battery pack charge-discharge control circuits

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110445222A (en) * 2019-08-27 2019-11-12 厦门炬研电子科技有限公司 A kind of lithium battery group charging-discharging controller

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110445222A (en) * 2019-08-27 2019-11-12 厦门炬研电子科技有限公司 A kind of lithium battery group charging-discharging controller

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