CN108155703A - A kind of improvement lithium cell protecting device and its charging MOS protection circuits - Google Patents
A kind of improvement lithium cell protecting device and its charging MOS protection circuits Download PDFInfo
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- CN108155703A CN108155703A CN201810197854.1A CN201810197854A CN108155703A CN 108155703 A CN108155703 A CN 108155703A CN 201810197854 A CN201810197854 A CN 201810197854A CN 108155703 A CN108155703 A CN 108155703A
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- 230000004224 protection Effects 0.000 title claims abstract description 73
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 55
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 55
- 230000006872 improvement Effects 0.000 title claims abstract description 21
- 229910001416 lithium ion Inorganic materials 0.000 claims abstract description 40
- 230000005611 electricity Effects 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 7
- 230000000903 blocking effect Effects 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000001012 protector Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
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- H02J7/0026—
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a kind of improvement lithium cell protecting device and its charging MOS protection circuits; including li-ion cell protection IC chip, charging MOS control circuits, electric discharge MOS control circuits and over-and under-voltage comparison circuit; shown li-ion cell protection IC chip is connect by over-and under-voltage comparison circuit with battery pack; charging MOS control circuits are connect with the charging MOS control interfaces of li-ion cell protection IC chip, and electric discharge MOS control circuits are connect with the electric discharge MOS control interfaces of li-ion cell protection IC chip；The charging MOS control interfaces of li-ion cell protection IC chip are also connected with charging MOS protection circuits; the MOS protection circuits that charge include the first transistor Q1 and the first transistor Q2; the collector of the first transistor Q1 is connect with the base stage of second transistor Q2, and the collector of second transistor Q2 is connect with the charging MOS control interfaces of li-ion cell protection IC chip.The function that lithium battery cannot discharge in charging is realized, and then solve has discharge current that can burn the technical issues of charging metal-oxide-semiconductor in charging process.
Description
Technical field
The present invention relates to technical field of lithium batteries more particularly to a kind of improvement lithium cell protecting device and its charging MOS to protect
Protection circuit.
Background technology
Lithium battery is since with small, light weight, bigger than energy, specific power is high, and memory-less effect, self discharge is small, follows
Ring service life is long, can repid discharge, and it is efficient the advantages that, and lithium-ions battery is green accumulator, will not be because useless
It abandons and causes secondary pollution, be increasingly becoming the mainstream of power battery.But due to lithium ion battery have it is apparent it is non-linear, differ
Cause property and time-varying characteristics, therefore need to carry out certain management in application.In addition requirement of the lithium battery to charge and discharge is very high, when
When there is excessive overcharge, overdischarge, discharge current or short circuit, lithium battery temperature rise can be made, seriously destroy lithium battery
Performance leads to shorter battery life.When lithium battery is used in series in power-equipment, due to internal special between each single lithium battery
Property it is inconsistent, can cause it is each section lithium battery charge and discharge it is inconsistent.During one section penalty, the behavior of entire battery pack is special
Sign can all be limited by this battery, reduce integral battery door group performance.It is excellent for lithium battery group is enable farthest to play its
More performance prolongs the service life, it is necessary to lithium battery in charge and discharge be monitored in real time, provide overvoltage, overcurrent, temperature
Balancing energy between protection and battery.
Lithium battery is generally managed by lithium battery pack management system BMS, and BMS is mounted on the inside of lithium battery group, with
Microcontroller core in order to control, while realizing to each section lithium cell energy balance, can also realize overcharge, cross put, overcurrent, temperature
Degree protection and short-circuit protection are shown the various states of battery pack by LCD, and can read each section by reserved communication port
The historical performance state of lithium battery.As shown in Figure 1, lithium battery intelligent management system BMS is mainly by charging module, data acquisition module
Block (including voltage, electric current, temperature data acquisition), balance module, electricity computing module, data disaply moudle and storage communication mould
Block forms；Whole system is using microcontroller as master controller, and by acquiring current information, it is in charging, electric discharge to judge battery pack
Or in idle state and whether there is over-current phenomenon avoidance, and respective handling is made to its state.Each economize on electricity cell voltage is acquired
After analysis, system decide whether start balance module to entire battery pack carry out balancing energy, while judge whether there is overcharge or
It crosses and puts phenomenon.The acquisition of temperature is mainly used for the overheat protector of system.The working condition of whole system, respectively saves voltage, is surplus electric current
Remaining electricity and temperature information can all pass through LCD MODULE real-time display.
But existing lithium battery pack management system BMS, generally using IC chip is protected, MCU processors, charge MOS, puts
Electric MOS, charging current detecting circuit and load detecting circuit form charge and discharge and keep.Protection IC chip constantly detects lithium battery
Voltage, electric current, temperature, under-voltage if there is overvoltage, overcurrent and short circuit, temperature anomaly then turn off corresponding circuit, if inspection
Charging current then MCU shutdowns electric discharge MOS has been measured, has detected that electric discharge metal-oxide-semiconductor is opened in load access after filling current cut-off.Pass through
Charging current detecting circuit and load detecting circuit cannot discharge when realizing charging, and circuit is complicated, need computer journey
Sequence cooperation could realize function, of high cost, poor practicability.
Invention content
In view of this, the purpose of the present invention is to provide a kind of improvement lithium cell protecting device and its charging MOS protection electricity
Road realizes the lithium battery function that cannot discharge in charging, and then solves and have discharge current that can burn in charging process to fill
The technical issues of electric metal-oxide-semiconductor.
Technical solution is as follows used by the present invention solves above-mentioned technical problem：
According to an aspect of the present invention, a kind of improvement lithium cell protecting device provided, including li-ion cell protection IC cores
Piece, charging MOS control circuits, electric discharge MOS control circuits and over-and under-voltage comparison circuit, shown li-ion cell protection IC chip are led to
It crosses the over-and under-voltage comparison circuit to connect with battery pack, the charging MOS control circuits and the li-ion cell protection IC chip
The connection of charging MOS control interfaces, the electric discharge MOS of electric discharge MOS control circuits and the li-ion cell protection IC chip controls
Interface connects；The charging MOS control interfaces of the li-ion cell protection IC chip are also connected with charging MOS protection circuits, described to fill
Electric MOS protection circuit includes the first transistor Q1 and the first transistor Q2, the collector of the first transistor Q1 and described the
The base stage connection of two-transistor Q2, the collector of the second transistor Q2 and the charging MOS of the li-ion cell protection IC chip
Control interface connects.
Further, a diode is set between the charging MOS control circuits and the electric discharge MOS control circuits, uses
In influence of the blocking charging MOS control circuits to the electric discharge MOS control circuits.
Further, the improvement lithium cell protecting device further includes load and charging detecting circuit, and the load is with filling
Power detection circuit one end is connect with charger or the negative connector of load, the other end and the charging of the li-ion cell protection IC chip
Device detection interface is connected with load detecting interface.
Further, the improvement lithium cell protecting device further includes temperature sensing circuit and protection delay circuit, described
Temperature sensing circuit and the protection delay circuit connect the temperature detection interface of the li-ion cell protection IC chip and prolong respectively
When interface.
Further, described over-and under-voltage comparison circuit one end is connected to the anode and cathode of lithium battery, other end connection
To the positive end interface of battery core of the li-ion cell protection IC chip.
Based on same inventive concept, another aspect of the present invention provides a kind of charging MOS protection circuits, including first
Transistor Q1 and the first transistor Q2, the collector of the first transistor Q1 are connect with the base stage of the second transistor Q2,
The collector of the second transistor Q2 is connect with the charging MOS control interfaces of li-ion cell protection IC chip；The first crystal
The emitter-base bandgap grading connection charger of pipe Q1 or the positive connector of load, the base stage of the first transistor Q1 are connected respectively by divider resistance
Connect the positive connector of the charger or load and the negative connector of the charger.
Further, the first transistor Q1 is PNP type triode, and the second transistor Q2 is NPN type triode.
Further, one is also connected between the base stage of the collector of the first transistor Q1 and the second transistor Q2
Load resistance.
Further, the emitter grounding of the second transistor Q2, between the emitter-base bandgap grading and base stage of the second transistor Q2
It has been arranged in parallel impedance capacitance and biasing resistor.
Beneficial effects of the present invention：
The improvement lithium cell protecting device of the embodiment of the present invention and its charging MOS protection circuits, by dividing mouth mold formula entirely
Lower one charging MOS protection circuits of setting, introduce diode and so that C- is not by B- in the case of no access load or charger
Drag down but by P+ be pulled upward to P+ equipotentials so that there is no power consumption on two divider resistances.So as to fulfill lithium battery
The function of not discharging in charging, this scheme are reached by simple several common devices and meet actual operation requirements, and can be stablized
Reliable operation.Compared with existing similar product, the technical program does not need to the cooperation of MCU control programs, few using component,
It is at low cost and safe and reliable.
Description of the drawings
Fig. 1 be the present embodiments relate to a kind of lithium battery management system structure diagram；
Fig. 2 is a kind of improvement lithium cell protecting device structure connection block diagram provided in an embodiment of the present invention；
Fig. 3 protects circuit principle structure figure for a kind of charging MOS provided in an embodiment of the present invention；
Fig. 4 is a kind of improvement lithium cell protecting device circuit principle structure figure provided in an embodiment of the present invention；
Wherein, 10- li-ion cell protections IC chip, 20- charging MOS control circuits, 30- electric discharge MOS control circuits, 40- fill
Electric MOS protects circuit, and 50- loads and charging detecting circuit, 60- temperature sensing circuits, 70- over-and under-voltage comparison circuits, 80- are protected
Protect delay circuit.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
In order to make technical problems, technical solutions and advantages to be solved clearer, clear, tie below
Drawings and examples are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
The first letter that BMS is BATTERY MANAGEMENT SYSTEM referred to as combines, and referred to as calls battery management system
System.Custom is referred to as battery nurse or battery house keeper；Battery management system (BMS) mainly aims at intelligent management and safeguards each
A battery unit, prevents battery from overcharge and overdischarge occur, extends the service life of battery, monitors the state of battery.Lithium electricity
Pond group management system is mounted on the inside of lithium battery group, equal to each section lithium battery energy realizing with microcontroller core in order to control
While weighing apparatus, can also realize overcharge, cross put, overcurrent, temperature protection and short-circuit protection.The various of battery pack are shown by LCD
State, and the historical performance state of each section lithium battery can be read by reserved communication port.As shown in Figure 1, lithium battery intelligence
System can be managed mainly by charging module, data acquisition module (including voltage, electric current, temperature data acquisition), balance module, electricity
Measure computing module, data disaply moudle and storage communication module composition.Whole system passes through acquisition using microcontroller as master controller
Current information judges that battery pack is in charging, electric discharge or in idle state and whether has over-current phenomenon avoidance, and its state is done
Go out respective handling.After being acquired analysis to each economize on electricity cell voltage, system decides whether to start balance module to entire battery pack
Balancing energy is carried out, while judges whether there is to overcharge or cross and puts phenomenon.The acquisition of temperature is mainly used for the overheat protector of system.It is whole
The working condition of a system, electric current, respectively section voltage, remaining capacity and temperature information all can in real time be shown by LCD MODULE
Show.
Embodiment 1
As shown in Fig. 2, the embodiment provides a kind of improvement lithium cell protecting device, including li-ion cell protection IC
Chip 10, charging MOS control circuits 20, electric discharge MOS control circuits 30 and over-and under-voltage comparison circuit 70, shown lithium battery are protected
Shield IC chip 10 is connect by the over-and under-voltage comparison circuit 70 with battery pack, it is described charge MOS control circuits 20 with it is described
The charging MOS control interfaces connection of li-ion cell protection IC chip 10, the electric discharge MOS control circuits 30 and the li-ion cell protection
The electric discharge MOS control interfaces connection of IC chip 10；The charging MOS control interfaces of the li-ion cell protection IC chip 10 are also connected with one
Charge MOS protection circuits 40, and the charging MOS protection circuits 40 include the first transistor Q1 and the first transistor Q2, and described the
The collector of one transistor Q1 is connect with the base stage of the second transistor Q2, the collector of the second transistor Q2 with it is described
The charging MOS control interfaces connection of li-ion cell protection IC chip.
Wherein, a diode D9 is set between the charging MOS control circuits 20 and the electric discharge MOS control circuits 30,
For blocking influence of the charging MOS control circuits 20 to the electric discharge MOS control circuits 30.
Wherein, the improvement lithium cell protecting device further includes load and charging detecting circuit 50, the load and charging
50 one end of detection circuit is connect with charger or the negative connector of load, and the other end is filled with the li-ion cell protection IC chip 10
Electrical testing interface is connected with load detecting interface.
Wherein, the improvement lithium cell protecting device further includes temperature sensing circuit 60 and protection delay circuit 80, described
The temperature detection that temperature sensing circuit 60 and the protection delay circuit 80 connect the li-ion cell protection IC chip 10 respectively connects
Mouth and Latency Interface.
Wherein, described 70 one end of over-and under-voltage comparison circuit is connected to the anode and cathode of lithium battery, and the other end is connected to
The positive end interface of battery core of the li-ion cell protection IC chip 10.
Embodiment 2
Based on same inventive concept, another aspect of the present invention to be protected as shown in figure 3, the present invention provides a kind of charging MOS
Protection circuit, including the first transistor Q1 and the first transistor Q2, the collector of the first transistor Q1 and second crystal
The base stage connection of pipe Q2, the collector of the second transistor Q2 connect with the charging MOS control interfaces of li-ion cell protection IC chip
It connects；The emitter-base bandgap grading connection charger of the first transistor Q1 or the positive connector P+/C+ of load, the base of the first transistor Q1
Pole connects the positive connector P+/C+ of the charger or load and the charger respectively by divider resistance R11, R23
Negative connector C-.
Wherein, the first transistor Q1 is PNP type triode, and the second transistor Q2 is NPN type triode.
Wherein, it also connects between the base stage of the collector of the first transistor Q1 and the second transistor Q2 load
Resistance R20.The first transistor Q1 collector voltages is made to change with base current and power on pressure in collector resistance and change, are risen
It is acted on to Current amplifier.
Wherein, the emitter grounding of the second transistor Q2, it is in parallel between the emitter-base bandgap grading and base stage of the second transistor Q2
It is provided with impedance capacitance C8 and biasing resistor R26.Resistance R26 is when ensureing that second transistor Q2 is not turned on, base stage drop-down ground connection；
The effect of capacitance C8 improves antijamming capability.
Specifically, it cannot discharge when charging for lithium battery, be implemented as R11, R23, Q1, R20, R26, C8,
Q2, D9.By the conducting of transistor Q1, Q2 in charging process, by the electric discharge MOS control interfaces of li-ion cell protection IC chip 10
It drags down and turns off electric discharge metal-oxide-semiconductor, this scheme simply capacitance-resistance and triode need only can be achieved with requiring.
As shown in figure 4, li-ion cell protection IC chip employs SH367107 family chips, specifically, dividing mouth mold formula entirely
Under, in the case of no charge or discharge, by introducing two pole D9, P+ will by resistance R11, R23 under normal circumstances
C- is pulled upward to does not have bias voltage to be in cut-off state with P+ equipotentials, triode Q1, and Q2 is also at cut-off state, the DSG of IC
Pin exports normal voltage.It accesses after charger, C- is pulled low, and for P+ by resistance R11, R13 is divided provides biased electrical to Q1
Pressure is so that Q1 conductings, and P+ voltages provide biasing resistor to triode Q2 by Q1 resistance R20, R26 and Q2 is connected, by IC's
DSG pins draw ground to realize and close electric discharge MOS；The function that lithium battery cannot discharge when charging is realized, and then is solved
There is the problem of discharge current can burn charging metal-oxide-semiconductor in charging process.
Lithium cell protecting device divides mouth generally to have 3 kinds：One kind be vacation divide mouth be exactly in fact inside charge and discharge power port be same
Circuit is covered, has only extracted two pairs of lines, as long as what living of can bearing of wire rod, do not had and asked with any to micro USB electric discharge
Topic；One kind is most common half point mouth, and battery core first passes through electric discharge MOS and draws discharge port, then is drawn by discharge port through overcharge MOS
Charge port, electric current is through overcharge MOS and electric discharge MOS when charging in this way, and electric current is only through overdischarge MOS during electric discharge；Under this structure
Can be normal when the effect for overcharging protection is not had when being charged with discharge port, and being discharged with charge port, but to consider charge MOS and
The overcurrent capability of charging wire.In general discharge current is much larger than charging current to the device of this half point mouth mode, does so
The cost of MOS can be saved.Also a kind of is the mode for dividing full mouth, and battery core draws a line and draws discharge port, electricity through overdischarge MOS
Core draws another line and draws charge port through overcharge MOS, it is impossible to which charge and discharge power port is used with.This full device for dividing mouth mode
More rare, maximum benefit is that charging and discharging currents individually get up easily, secondly maximumlly reducing device by detection
On loss.
In the description of patent of the present invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " suitable
The orientation or position relationship of the instructions such as hour hands ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction ", " row ", " row " are based on attached drawing
Shown orientation or position relationship are for only for ease of description patent of the present invention and simplify description rather than instruction or imply institute
The device or element of finger must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that this hair
The novel limitation of bright patent.
In addition, term " first ", " second " are only used for description purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of patent of the present invention, " multiple " are meant that at least two, such as two
It is a, three etc., unless otherwise specifically defined.
In patent of invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed ", the terms such as " connected " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or integrally；
Can be mechanical connection or electrical connection；It can be directly connected, can also be indirectly connected by intermediary, it can be with
It is the interaction relationship of connection inside two elements or two elements, unless otherwise restricted clearly.For this field
For those of ordinary skill, concrete meaning of the above-mentioned term in patent of the present invention can be understood as the case may be.
In patent of the present invention unless specifically defined or limited otherwise, fisrt feature is "above" or "below" second feature
Can be that the first and second features are in direct contact or the first and second features pass through intermediary mediate contact.Moreover, first is special
Sign second feature " on ", " top " and " above " can be fisrt feature right over second feature or oblique upper or only
Represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be with
It is fisrt feature immediately below second feature or obliquely downward or is merely representative of fisrt feature level height less than second feature.
Claims (9)
1. a kind of improvement lithium cell protecting device, including li-ion cell protection IC chip, charging MOS control circuits, electric discharge MOS controls
Circuit and over-and under-voltage comparison circuit, shown li-ion cell protection IC chip pass through the over-and under-voltage comparison circuit and battery pack
Connection, the charging MOS control circuits are connect with the charging MOS control interfaces of the li-ion cell protection IC chip, the electric discharge
MOS control circuits are connect with the electric discharge MOS control interfaces of the li-ion cell protection IC chip；It is characterized in that, the lithium battery
The charging MOS control interfaces of protection IC chip are also connected with charging MOS protection circuits, and the charging MOS protection circuits include the
One transistor Q1 and the first transistor Q2, the collector of the first transistor Q1 and the base stage of the second transistor Q2 connect
It connects, the collector of the second transistor Q2 is connect with the charging MOS control interfaces of the li-ion cell protection IC chip.
A kind of 2. improvement lithium cell protecting device according to claim 1, which is characterized in that the charging MOS control electricity
A diode is set between road and the electric discharge MOS control circuits, for blocking the charging MOS control circuits to the electric discharge
The influence of MOS control circuits.
A kind of 3. improvement lithium cell protecting device according to claim 2, which is characterized in that the improvement li-ion cell protection
Device further includes load and charging detecting circuit, and the load connects with charging detecting circuit one end and charger or the negative of load
Head connection, the other end detects interface with the charger of the li-ion cell protection IC chip and load detecting interface is connect.
A kind of 4. improvement lithium cell protecting device according to claim 2, which is characterized in that the improvement li-ion cell protection
Device further includes temperature sensing circuit and protection delay circuit, and the temperature sensing circuit and the protection delay circuit connect respectively
Connect the temperature detection interface and Latency Interface of the li-ion cell protection IC chip.
5. a kind of improvement lithium cell protecting device according to claim 2, which is characterized in that the over-and under-voltage is more electric
Road one end is connected to the anode and cathode of lithium battery, and the battery core that the other end is connected to the li-ion cell protection IC chip just terminates
Mouthful.
6. a kind of charging MOS protection circuits, which is characterized in that including the first transistor Q1 and the first transistor Q2, described first
The collector of transistor Q1 is connect with the base stage of the second transistor Q2, the collector and lithium battery of the second transistor Q2
Protect the charging MOS control interfaces connection of IC chip；The emitter-base bandgap grading connection charger of the first transistor Q1 or load are just
Connector, the base stage of the first transistor Q1 connected respectively by divider resistance the charger or load positive connector and
The negative connector of the charger.
7. a kind of charging MOS protection circuits according to claim 6, which is characterized in that the first transistor Q1 is PNP
Type triode, the second transistor Q2 is NPN type triode.
A kind of 8. charging MOS protection circuits according to claim 6, which is characterized in that the collection of the first transistor Q1
It also connects between the base stage of electrode and the second transistor Q2 load resistance.
9. a kind of charging MOS protection circuits according to claim 6, which is characterized in that the second transistor Q2's penetrates
Pole is grounded, and impedance capacitance and biasing resistor have been arranged in parallel between the emitter-base bandgap grading and base stage of the second transistor Q2.
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| CN201810197854.1A CN108155703A (en) | 2018-03-11 | 2018-03-11 | A kind of improvement lithium cell protecting device and its charging MOS protection circuits |
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| CN201810197854.1A CN108155703A (en) | 2018-03-11 | 2018-03-11 | A kind of improvement lithium cell protecting device and its charging MOS protection circuits |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109347179A (en) * | 2018-12-07 | 2019-02-15 | 浙江千喜新能源有限公司 | Lithium battery group charge and discharge protecting plate sampling control circuit |
| CN113285508A (en) * | 2021-05-26 | 2021-08-20 | 东莞新能安科技有限公司 | Battery protection circuit, battery management system and consumer |
| CN114530914A (en) * | 2022-03-15 | 2022-05-24 | 苏州赛芯电子科技股份有限公司 | Battery protection system and lithium battery |
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| CN107769280A (en) * | 2016-08-19 | 2018-03-06 | 成都库仑科技有限公司 | A kind of charge-discharge circuit and charge and discharge protecting method, management system and management method based on the circuit |
| CN107785966A (en) * | 2017-11-11 | 2018-03-09 | 河南森源电气股份有限公司 | Battery charge-discharge circuit with short circuit and reversal connection protection function |
| CN208127911U (en) * | 2018-03-11 | 2018-11-20 | 深圳大力神科技有限公司 | A kind of improvement lithium cell protecting device and its MOS that charges protect circuit |
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| CN109347179A (en) * | 2018-12-07 | 2019-02-15 | 浙江千喜新能源有限公司 | Lithium battery group charge and discharge protecting plate sampling control circuit |
| CN113285508A (en) * | 2021-05-26 | 2021-08-20 | 东莞新能安科技有限公司 | Battery protection circuit, battery management system and consumer |
| CN114530914A (en) * | 2022-03-15 | 2022-05-24 | 苏州赛芯电子科技股份有限公司 | Battery protection system and lithium battery |
| CN114530914B (en) * | 2022-03-15 | 2023-03-14 | 苏州赛芯电子科技股份有限公司 | Battery protection system and lithium battery |
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