CN206389144U - A kind of BMS charge and discharge controls protection circuit - Google Patents
A kind of BMS charge and discharge controls protection circuit Download PDFInfo
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- CN206389144U CN206389144U CN201621465705.1U CN201621465705U CN206389144U CN 206389144 U CN206389144 U CN 206389144U CN 201621465705 U CN201621465705 U CN 201621465705U CN 206389144 U CN206389144 U CN 206389144U
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Abstract
The utility model discloses a kind of BMS charge and discharge controls protection circuit, including：Control centre, charging MOS drive circuit, electric discharge MOS drive circuit, charging MOS circuits and electric discharge MOS circuits, first control output end of control centre is connected with the first control signal of the MOS drive circuit that charges, second control output end is connected with the second control signal of the MOS drive circuit that charges, 3rd control output end is connected with the first control signal of MOS drive circuit of discharging, the 4th control output end and the second control signal of electric discharge MOS drive circuit；The output end for the MOS drive circuit that charges is connected with charging MOS circuits；The output end for MOS drive circuit of discharging is connected with electric discharge MOS circuits；Charging MOS circuits and electric discharge MOS circuits are sequentially connected in series between total negative terminal of battery pack and the negative pole end of charger, and the MOS drive circuit driven using multistage triode controls charging and discharging MOS circuits, and switching speed is fast, and switching loss is low, and circuit is simple, and cost is low.
Description
Technical field
The utility model is related to battery management system field, more particularly to a kind of BMS charge and discharge controls protection circuit.
Background technology
, it is necessary to which metal-oxide-semiconductor is come the charge and discharge process that controls and protect battery in accumulation energy type battery management system, metal-oxide-semiconductor can be with
The anode control of battery is placed on, negative terminal control can also be placed on, but when anode is controlled, in a flash may in shut-off MOS
Vibration is produced, flashy high current causes MOS to puncture, if this problem, would not occur in selection negative terminal control.Metal-oxide-semiconductor
Select to control to need special drive circuit in negative terminal, because metal-oxide-semiconductor needs super-high-current, if the on or off time
Oversize, the loss power of metal-oxide-semiconductor is too big, not only reduces the used life of metal-oxide-semiconductor, and easily generates heat.Existing fast shut-off MOS
The method of pipe, one kind is to use driving chip, and one kind is using a transistor drive circuit.The former cost is high, and circuit is complicated；
The latter's driving current can not meet the requirement of high current metal-oxide-semiconductor switch.
Utility model content
The purpose of this utility model is to overcome weak point of the prior art to be protected there is provided a kind of BMS charge and discharge controls
Circuit.
The purpose of this utility model is achieved through the following technical solutions：
A kind of BMS charge and discharge controls protection circuit, including：Control centre, charging MOS drive circuit, electric discharge MOS driving electricity
Road, charging MOS circuits and electric discharge MOS circuits, the first control output end of the control centre and the charging MOS drive circuit
The first control signal connection, the second control output end with it is described charge MOS drive circuit the second control signal be connected,
3rd control output end with it is described electric discharge MOS drive circuit the first control signal be connected, the 4th control output end with it is described
Second control signal of MOS drive circuit of discharging；
The output end of the charging MOS drive circuit is connected with the charging MOS circuits；
The output end of the electric discharge MOS drive circuit is connected with the electric discharge MOS circuits；
The charging MOS circuits are sequentially connected in series total negative terminal and the negative pole end of charger in battery pack with electric discharge MOS circuits
Between.
In one of the embodiments, the first test side of the control centre is connected with the charging MOS drive circuit,
Second test side is connected with the electric discharge MOS drive circuit；
In one of the embodiments, the control centre includes：MCU control unit and AFE analog front-end units, it is described
MCU control unit is connected with the AFE analog front-end units signal；
Two output ends of the MCU control unit are respectively as the first control output end of the control centre and the 4th
Control output end；
Two output ends of the AFE analog front-end units respectively as the control centre the second control output end and
3rd control output end.
In one of the embodiments, the charging MOS drive circuit includes：Charge switch control unit, charging one-level
Current amplification unit and charging two-level current amplifying unit, the charge switch control unit, the charging one-level Current amplifier
Unit and the charging two-level current amplifying unit are linked in sequence；
The input of the charge switch control unit respectively with the first control output end of the control centre and second
Control output end is connected, and the output end of the charging two-level current amplifying unit detects defeated with the first of the control centre respectively
Go out end and charging MOS circuit connections.
In one of the embodiments, the charge switch control unit includes：First resistor R1, second resistance R2,
Three resistance R3 and first switch pipe Q1, the first resistor R1 one end are controlled as the second of the charging MOS drive circuit
Input is connected with the second control output end of the control centre, other end one end respectively with the 3rd resistor R3 and institute
State first switch pipe Q1 grid connection；
First control signal and the control of the one end of the second resistance R2 as the charging MOS drive circuit
The first control output end connection at center, the other end is connected with the grid of the first switch pipe Q1；
The other end of the 3rd resistor R3 is connected with reference ground GND；
The source electrode of the first switch pipe Q1 is connected with reference ground GND；
The charging one-level current amplification unit includes：4th resistance R4, the 5th resistance R5 and second switch pipe Q2, it is described
One end of 5th resistance is connected with the drain electrode of the first switch pipe Q1, and the base stage of the other end and the second switch pipe Q2 connects
Connect；
One end of the 4th resistance R4 is connected with the base stage of the second switch pipe Q2, the other end and the second switch
Pipe Q2 emitter stage connection；
The emitter stage of the second switch pipe Q2 is connected with power Vcc；
The charging two-level current amplifying unit includes：6th resistance R6, the 7th resistance R7, the 3rd switching tube Q3 and the 4th
Switching tube Q4, the 7th resistance R7 one end as it is described charging MOS drive circuit output end respectively with the charging MOS
The first test side connection of circuit and the control centre；
The base stage of 4th switching tube Q4 colelctor electrode respectively with the second switch pipe Q2, the 3rd switching tube Q3
Base stage and the 6th resistance R6 one end connection, colelctor electrode is connected with the power Vcc, emitter stage and the 7th resistance
R7 one end connection；
The other end of the 7th resistance R7 is connected with the emitter stage of the 3rd switching tube Q3；
The colelctor electrode of the 3rd switching tube Q3 is connected with total negative terminal of the battery pack；
The other end of the 6th resistance R6 is connected with total negative terminal of the battery pack.
In one of the embodiments, the electric discharge MOS drive circuit includes：Discharge switch control unit, electric discharge one-level
Current amplification unit and electric discharge two-level current amplifying unit, the discharge switch control unit, the electric discharge one-level Current amplifier
Unit and the electric discharge two-level current amplifying unit are linked in sequence；
The input of the discharge switch control unit respectively with the 3rd control output end of the control centre and the 4th
Control output end is connected, and the output end of the electric discharge two-level current amplifying unit detects defeated with the first of the control centre respectively
Go out end and charging MOS circuit connections.
In one of the embodiments, the discharge switch control unit includes：Tenth resistance R10, the 11st resistance
R11, the 12nd resistance R12 and the 5th switching tube Q5, one end of the tenth resistance R10 are used as the electric discharge MOS drive circuit
The 4th control signal be connected with the second control output end of the control centre, the other end respectively with the 12nd resistance
R12 one end and the 5th switching tube Q5 connections；
One end of the 11st resistance R11 as it is described electric discharge MOS drive circuit the 3rd control signal with it is described
The 3rd control output end connection of control centre, the other end is connected with the source electrode of the 5th switching tube Q5；
The other end of the 12nd resistance R12 is connected with the 5th switching tube Q5 and reference ground GND respectively；
The electric discharge one-level current amplification unit includes：13rd resistance R13, the 14th resistance R14, the first diode D1
With the 6th switching tube Q6, one end of the 13rd resistance R13 is connected with the drain electrode of the 5th switching tube Q5, the other end point
Base stage not with the 14th resistance R14 and the 6th switching tube Q6 is connected；
The emitter stage of the 6th switching tube Q6 is connected with one end of the 14th resistance R14 and power Vcc respectively,
Colelctor electrode is connected with the anode of the first diode D1；
The electric discharge two-level current amplifying unit includes：15th resistance R15, the 16th resistance R16, the 7th switching tube
Q7, the 8th switching tube Q8 and the second diode D2, one end of the 15th resistance R15 are used as the electric discharge MOS drive circuit
Second test side of the output end respectively with the electric discharge MOS circuits, the control centre be connected；
The anode of second diode is connected with power Vcc, and negative electrode is connected with the 7th switching tube Q7 colelctor electrodes；
The base stage of 7th switching tube Q7 negative electrode respectively with the first diode D1, the 8th switching tube Q8
Base stage and the 16th resistance R16 one end connection, emitter stage are connected with one end of the 15th resistance R15；
The other end of the 16th resistance R16 is connected with the charger negative pole；
The emitter stage of the 8th switching tube Q8 is connected with one end of the 15th resistance R15, and colelctor electrode fills with described
Electrical equipment negative pole is connected.
This technical scheme has following beneficial effect compared to prior art：
1. using the MOS drive circuit control charging and discharging MOS circuits of multistage triode driving, switching speed is fast, switch
Loss is low, and circuit is simple, and cost is low.
2. control centre is lost using MCU control unit and the combining form of AFE analog front-end units in MCU control units
AFE analog front-end units can control metal-oxide-semiconductor drive circuit works during the situation of effect, improve the stability and security of circuit.
3. control centre utilizes the first test side and the second test side, when startup is overcharged or during Cross prevention, Ke Yitong
Cross the magnitude of voltage of the first test side of detection and the second test side to judge whether to have been switched off charge or discharge MOS circuits, enter
One step improves the safety coefficient of circuit, and stability is strong.
4. using metal-oxide-semiconductor in battery pack negative terminal, relative to metal-oxide-semiconductor in battery pack positive terminal control, safety coefficient is high, will not go out
The existing easy breakdown phenomenon of metal-oxide-semiconductor.
Brief description of the drawings
Fig. 1 is the BMS charge and discharge control protection circuit frame diagrams in the present embodiment；
Fig. 2 is the charging MOS drive circuit frame diagram in the present embodiment；
Fig. 3 is the charging MOS drive circuit schematic diagram in the present embodiment；
Fig. 4 is the electric discharge MOS drive circuit frame diagram in the present embodiment；
Fig. 5 is the electric discharge MOS drive circuit schematic diagram in the present embodiment.
Embodiment
For the ease of understanding the utility model, the utility model is more fully retouched below with reference to relevant drawings
State.Better embodiment of the present utility model is given in accompanying drawing.But, the utility model can come in many different forms
Realize, however it is not limited to embodiments described herein.On the contrary, the purpose for providing these embodiments is to make to this practicality newly
It is more thorough comprehensive that the disclosure of type understands.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or can also have element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " level ", " left side ",
For illustrative purposes only, it is unique embodiment to be not offered as " right side " and similar statement.
Unless otherwise defined, all of technologies and scientific terms used here by the article is led with belonging to technology of the present utility model
The implication that the technical staff in domain is generally understood that is identical.It is herein to be in term used in the description of the present utility model
The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term as used herein " and/or " bag
Include the arbitrary and all combination of one or more related Listed Items.
It is BMS charge and discharge control protection circuit frame diagrams as shown in Figure 1, reference picture 2, Fig. 3 is please combined in the lump, including：Control
Center 100 processed, charging MOS drive circuit 200, electric discharge MOS drive circuit 300, charging MOS circuits 400 and electric discharge MOS circuits
500, the first control output end of the control centre 100 and the first control signal of the charging MOS drive circuit 200 connect
Connect, the second control output end is connected with the second control signal of the charging MOS drive circuit 200, the 3rd control output end
It is connected with the first control signal of the electric discharge MOS drive circuit 300, the 4th control output end drives with the electric discharge MOS
Second control signal of circuit 300；
The output end of the charging MOS drive circuit 200 is connected with the charging MOS circuits 400；
The output end of the electric discharge MOS drive circuit 300 is connected with the electric discharge MOS circuits 500；
The charging MOS circuits 400 and electric discharge MOS circuits 500 are sequentially connected in series total negative terminal and charger in battery pack
Between negative pole end.
Specifically, the first test side of the control centre 100 is connected with the charging MOS drive circuit 200, the second inspection
End is surveyed to be connected with the electric discharge MOS drive circuit 300；
Specifically, the control centre 100 includes：MCU control unit 101 and AFE analog front-end units 102, it is described
MCU control unit 101 is connected with the signal of AFE analog front-end units 102；
First control output end of two output ends of the MCU control unit 101 respectively as the control centre 100
With the 4th control output end；
Two output ends of the AFE analog front-end units 102 are defeated respectively as the second control of the control centre 100
Go out end and the 3rd control output end.
It should be noted that when battery pack charging starts, the control of MCU control unit 101 first control output end (i.e. Fig. 1
In MCU_DSG) and the 4th control output end (i.e. MCU_CHG in Fig. 1) control charging MOS drive circuit 200 promote charging
MOS circuits 400 are started working, when the voltage for detecting battery reaches the alarming value overcharged, and MCU control unit 101 passes through control
The first control output end control charging shut-off charging MOS circuits of drive circuit 200 are made, battery pack stops charging.
It should also be noted that, when battery power discharge starts, MCU control unit 101 controls the first control output end (to scheme
MCU_DSG in 1) and the 4th control output end (i.e. MCU_CHG in Fig. 1) control electric discharge MOS drive circuit promote charging
MOS circuits 400 are started working, when the voltage for detecting battery reached the alarming value put, and MCU control unit 101 passes through control
The 4th control output end control electric discharge shut-off electric discharge MOS circuits of drive circuit 300 are made, battery pack stops electric discharge.
It should also be noted that, AFE analog front-end units 102 can also by the second control output end (i.e. Fig. 1's
GPOH1) and the 3rd control output end (i.e. Fig. 1 GPOH2) control charging MOS drive circuit 200 and electric discharge MOS drive circuit
300 and then control charging MOS circuits 400 and electric discharge MOS circuits 500, in MCU control unit 101 because special circumstances can not work
When, start AFE analog front-end units 102 and control, improve the security of circuit.
It should also be noted that, by detecting the first test side (i.e. Fig. 1 BACK_DHG) and the second test side (i.e. Fig. 1
BACK_CHG) this 2 points magnitude of voltage judges whether to have been switched off charging MOS circuits 400 and or electric discharge MOS circuits 500.
Specifically, the charging MOS drive circuit 200 includes：Charge switch control unit 201, charging one-level electric current are put
Big unit 202 and charging two-level current amplifying unit 203, the charge switch control unit 201, the charging one-level electric current
Amplifying unit 202 and the charging two-level current amplifying unit 203 are linked in sequence；
The first control output end of the input of the charge switch control unit 201 respectively with the control centre 100
With the connection of the second control output end, the output end of the charging two-level current amplifying unit 203 respectively with the control centre 100
The first detection output and charging MOS circuits 400 connect.
Further, the charge switch control unit 201 includes：First resistor R1, second resistance R2,3rd resistor R3
With first switch pipe Q1, one end of the first resistor R1 as the charging MOS drive circuit 200 the second control signal
Be connected with the second control output end of the control centre 100, the other end respectively with one end of the 3rd resistor R3 and described
First switch pipe Q1 grid connection；
One end of the second resistance R2 as it is described charging MOS drive circuit 200 the first control signal with it is described
The first control output end connection of control centre 100, the other end is connected with the grid of the first switch pipe Q1；
The other end of the 3rd resistor R3 is connected with reference ground GND；
The source electrode of the first switch pipe Q1 is connected with reference ground GND；
The charging one-level current amplification unit 202 includes：4th resistance R4, the 5th resistance R5 and second switch pipe Q2,
One end of 5th resistance is connected with the drain electrode of the first switch pipe Q1, the base stage of the other end and the second switch pipe Q2
Connection；
One end of the 4th resistance R4 is connected with the base stage of the second switch pipe Q2, the other end and the second switch
Pipe Q2 emitter stage connection；
The emitter stage of the second switch pipe Q2 is connected with power Vcc；
The charging two-level current amplifying unit 203 includes：6th resistance R6, the 7th resistance R7, the 3rd switching tube Q3 and
4th switching tube Q4, the 7th resistance R7 one end as it is described charging MOS drive circuit 200 output end respectively with it is described
The first test side connection of charging MOS circuits and the control centre 100；
The base stage of 4th switching tube Q4 colelctor electrode respectively with the second switch pipe Q2, the 3rd switching tube Q3
Base stage and the 6th resistance R6 one end connection, colelctor electrode is connected with the power Vcc, emitter stage and the 7th resistance
R7 one end connection；
The other end of the 7th resistance R7 is connected with the emitter stage of the 3rd switching tube Q3；
The colelctor electrode of the 3rd switching tube Q3 is connected with total negative terminal of the battery pack；
The other end of the 6th resistance R6 is connected with total negative terminal of the battery pack.
It should be noted that Fig. 2 is refer to, and when the first control output end is high level, first switch pipe Q1 conductings,
Drain as low level, second switch pipe Q2 base potential is pulled low, now second switch pipe Q2 is turned on, second switch pipe Q2
Emitter stage be driven high, that is, the 4th switching tube Q4 base stages be high level, the 4th switching tube Q4 conducting, at this moment, the charging
MOS drive circuit 200 exports high level, and control charging MOS circuits 400 work, started to charge up；
When the first control output end is low level, first switch pipe Q1 cut-offs, now second switch pipe Q2 is also switched off,
3rd switching tube Q3 base stage is dragged down by the 6th resistance R6, because the 3rd switching tube Q3 manages for PNP, now the 3rd switching tube Q3
Conducting, at this moment, the charging MOS drive circuit 200 output low level, control charging MOS circuits 400 are stopped, stop filling
Electricity, reaches the purpose rapidly switched off, reduces the switching loss of MOS pipes.
Specifically, the electric discharge MOS drive circuit 300 includes：Discharge switch control unit 301, electric discharge one-level electric current are put
Big unit 302 and electric discharge two-level current amplifying unit 303, the discharge switch control unit 301, the electric discharge one-level electric current
Amplifying unit 302 and the electric discharge two-level current amplifying unit 303 are linked in sequence；
The 3rd control output end of the input of the discharge switch control unit 301 respectively with the control centre 100
With the connection of the 4th control output end, the output end of the electric discharge two-level current amplifying unit 303 respectively with the control centre 100
The first detection output and charging MOS circuits 300 connect.
Further, the discharge switch control unit 301 includes：Tenth resistance R10, the 11st resistance R11, the tenth
Two resistance R12 and the 5th switching tube Q5, the tenth resistance R10 one end are used as the 4th of the electric discharge MOS drive circuit 300
Control signal is connected with the second control output end of the control centre 100, the other end respectively with the 12nd resistance R12
One end and the 5th switching tube Q5 connections；
Threeth control signal and institute of the one end of the 11st resistance R11 as the electric discharge MOS drive circuit 300
The 3rd control output end connection of control centre 100 is stated, the other end is connected with the source electrode of the 5th switching tube Q5；
The other end of the 12nd resistance R12 is connected with the 5th switching tube Q5 and reference ground GND respectively；
The electric discharge one-level current amplification unit 302 includes：13rd resistance R13, the 14th resistance R14, the one or two pole
Pipe D1 and the 6th switching tube Q6, one end of the 13rd resistance R13 is connected with the drain electrode of the 5th switching tube Q5, the other end
The base stage with the 14th resistance R14 and the 6th switching tube Q6 is connected respectively；
The emitter stage of the 6th switching tube Q6 is connected with one end of the 14th resistance R14 and power Vcc respectively,
Colelctor electrode is connected with the anode of the first diode D1；
The electric discharge two-level current amplifying unit (303) includes：15th resistance R15, the 16th resistance R16, the 7th open
The one end for closing pipe Q7, the 8th switching tube Q8 and the second diode D2, the 15th resistance R15 drives as the electric discharge MOS
Second test side of the output end of circuit (300) respectively with the electric discharge MOS circuits, the control centre (100) is connected；
The anode of the second diode D2 is connected with power Vcc, and negative electrode is connected with the 7th switching tube Q7 colelctor electrodes；
The base stage of 7th switching tube Q7 negative electrode respectively with the first diode D1, the 8th switching tube Q8
Base stage and the 16th resistance R16 one end connection, emitter stage are connected with one end of the 15th resistance R15；
The other end of the 16th resistance R16 is connected with the charger negative pole；
The emitter stage of the 8th switching tube Q8 is connected with one end of the 15th resistance R15, and colelctor electrode fills with described
Electrical equipment negative pole is connected.
It should be noted that the work of the operation principle and charging MOS drive circuit 200 of electric discharge MOS drive circuit 300
Principle is identical, is not described in the operation principle in detail to MOS drive circuit 300 of discharging.
It should also be noted that, being connected with the first diode D1, purpose between the 7th switching tube Q7 and the 6th switching tube Q6
It is to prevent pouring in down a chimney for load current, damages the 7th switching tube Q7 and the 6th switching tube Q6 and power Vcc.
It should also be noted that, charging MOS drive circuit 200 also includes charging output protection unit 204, charging output is protected
Shield unit 204 is made up of resistance, electric capacity, voltage-regulator diode, in order to the output of constant charge MOS drive circuit 200,
The stability of circuit is improved, similarly, electric discharge MOS drive circuit 300 also includes electric discharge output protection unit 205, and electric discharge output is protected
Shield unit 205 is also made up of resistance, electric capacity, voltage-regulator diode, and purpose is defeated also for stable discharging MOS drive circuit 300
Go out.
Embodiment described above only expresses several embodiments of the present utility model, and it describes more specific and detailed
Carefully, but can not therefore and be interpreted as the limitation to the utility model the scope of the claims.It should be pointed out that for the general of this area
For logical technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these are all
Belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (7)
1. a kind of BMS charge and discharge controls protection circuit, it is characterised in that including：Control centre (100), charging MOS drive circuit
(200), electric discharge MOS drive circuit (300), charging MOS circuits (400) and electric discharge MOS circuits (500), the control centre
(100) the first control output end is connected with the first control signal of the charging MOS drive circuit (200), the second control
Output end is connected with the second control signal of the charging MOS drive circuit (200), the 3rd control output end and the electric discharge
The first control signal connection of MOS drive circuit (300), the 4th control output end and the electric discharge MOS drive circuit (300)
The second control signal；
The output end of the charging MOS drive circuit (200) is connected with the charging MOS circuits (400)；
The output end of the electric discharge MOS drive circuit (300) is connected with the electric discharge MOS circuits (500)；
The charging MOS circuits (400) are connected on total negative terminal of battery pack and the negative pole of charger with electric discharge MOS circuits (500)
Between end.
2. BMS charge and discharge controls protection circuit according to claim 1, it is characterised in that the control centre (100)
First test side is connected with the charging MOS drive circuit (200), the second test side and the electric discharge MOS drive circuit (300)
Connection.
3. BMS charge and discharge controls protection circuit according to claim 2, it is characterised in that control centre (100) bag
Include：MCU control unit (101) and AFE analog front-end units (102), before the MCU control unit (101) is simulated with the AFE
End unit (102) signal is connected；
First control output end of two output ends of the MCU control unit (101) respectively as the control centre (100)
With the 4th control output end；
Two output ends of the AFE analog front-end units (102) are defeated respectively as the second control of the control centre (100)
Go out end and the 3rd control output end.
4. BMS charge and discharge controls protection circuit according to claim 3, it is characterised in that the charging MOS drive circuit
(200) include：Charge switch control unit (201), charging one-level current amplification unit (202) and charging two-level current amplification are single
First (203), the charge switch control unit (201), the charging one-level current amplification unit (202) and two grades of the charging
Current amplification unit (203) is linked in sequence；
The first control output end of the input of the charge switch control unit (201) respectively with the control centre (100)
With the second control output end connection, it is described charging two-level current amplifying unit (203) output end respectively with the control centre
(100) the first detection output and charging MOS circuits (400) connection.
5. BMS charge and discharge controls protection circuit according to claim 4, it is characterised in that the charge switch control is single
First (201) include：First resistor R1, second resistance R2,3rd resistor R3 and first switch pipe Q1, the one of the first resistor R1
Hold defeated as the second control signal of the charging MOS drive circuit (200) and the second control of the control centre (100)
Go out end connection, the other end is connected with one end of the 3rd resistor R3 and the grid of the first switch pipe Q1 respectively；
First control signal and the control of the one end of the second resistance R2 as the charging MOS drive circuit (200)
The first control output end connection of center (100) processed, the other end is connected with the grid of the first switch pipe Q1；
The other end of the 3rd resistor R3 is connected with reference ground GND；
The source electrode of the first switch pipe Q1 is connected with reference ground GND；
The charging one-level current amplification unit (202) includes：4th resistance R4, the 5th resistance R5 and second switch pipe Q2, institute
The one end for stating the 5th resistance is connected with the drain electrode of the first switch pipe Q1, and the base stage of the other end and the second switch pipe Q2 connects
Connect；
One end of the 4th resistance R4 is connected with the base stage of the second switch pipe Q2, the other end and the second switch pipe Q2
Emitter stage connection；
The emitter stage of the second switch pipe Q2 is connected with power Vcc；
The charging two-level current amplifying unit (203) includes：6th resistance R6, the 7th resistance R7, the 3rd switching tube Q3 and
Four switching tube Q4, the 7th resistance R7 one end as it is described charging MOS drive circuit (200) output end respectively with it is described
The first test side connection of charging MOS circuits and the control centre (100)；
Colelctor electrode, the base of the 3rd switching tube Q3 of the base stage of the 4th switching tube Q4 respectively with the second switch pipe Q2
Pole and the connection of one end of the 6th resistance R6, colelctor electrode are connected with the power Vcc, and emitter stage is with the 7th resistance R7's
One end is connected；
The other end of the 7th resistance R7 is connected with the emitter stage of the 3rd switching tube Q3；
The colelctor electrode of the 3rd switching tube Q3 is connected with total negative terminal of the battery pack；
The other end of the 6th resistance R6 is connected with total negative terminal of the battery pack.
6. BMS charge and discharge controls protection circuit according to claim 2, it is characterised in that the electric discharge MOS drive circuit
(300) include：Discharge switch control unit (301), electric discharge one-level current amplification unit (302) and electric discharge two-level current amplification are single
First (303), the discharge switch control unit (301), the electric discharge one-level current amplification unit (302) and two grades of the electric discharge
Current amplification unit (303) is linked in sequence；
The 3rd control output end of the input of the discharge switch control unit (301) respectively with the control centre (100)
With the 4th control output end connection, it is described electric discharge two-level current amplifying unit (303) output end respectively with the control centre
(100) the first detection output and charging MOS circuits (300) connection.
7. BMS charge and discharge controls protection circuit according to claim 6, it is characterised in that the discharge switch control is single
First (301) include：Tenth resistance R10, the 11st resistance R11, the 12nd resistance R12 and the 5th switching tube Q5, the tenth electricity
Hinder fourth control signal and the control centre (100) of the R10 one end as the electric discharge MOS drive circuit (300)
Second control output end is connected, and the other end is connected with one end of the 12nd resistance R12 and the 5th switching tube Q5 respectively；
One end of the 11st resistance R11 as it is described electric discharge MOS drive circuit (300) the 3rd control signal with it is described
The 3rd control output end connection of control centre (100), the other end is connected with the source electrode of the 5th switching tube Q5；
The other end of the 12nd resistance R12 is connected with the 5th switching tube Q5 and reference ground GND respectively；
The electric discharge one-level current amplification unit (302) includes：13rd resistance R13, the 14th resistance R14, the first diode
D1 and the 6th switching tube Q6, one end of the 13rd resistance R13 is connected with the drain electrode of the 5th switching tube Q5, the other end point
Base stage not with the 14th resistance R14 and the 6th switching tube Q6 is connected；
The emitter stage of the 6th switching tube Q6 is connected with one end of the 14th resistance R14 and power Vcc respectively, colelctor electrode
It is connected with the anode of the first diode D1；
The electric discharge two-level current amplifying unit (303) includes：15th resistance R15, the 16th resistance R16, the 7th switching tube
Q7, the 8th switching tube Q8 and the second diode D2, one end of the 15th resistance R15 are used as the electric discharge MOS drive circuit
(300) second test side of the output end respectively with the electric discharge MOS circuits, the control centre (100) is connected；
The anode of second diode is connected with power Vcc, and negative electrode is connected with the 7th switching tube Q7 colelctor electrodes；
The base stage of 7th switching tube Q7 negative electrode respectively with the first diode D1, the base stage of the 8th switching tube Q8
Connected with one end of the 16th resistance R16, emitter stage is connected with one end of the 15th resistance R15；
The other end of the 16th resistance R16 is connected with the charger negative pole；
The emitter stage of the 8th switching tube Q8 is connected with one end of the 15th resistance R15, colelctor electrode and the charger
Negative pole is connected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621465705.1U CN206389144U (en) | 2016-12-29 | 2016-12-29 | A kind of BMS charge and discharge controls protection circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621465705.1U CN206389144U (en) | 2016-12-29 | 2016-12-29 | A kind of BMS charge and discharge controls protection circuit |
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| CN206389144U true CN206389144U (en) | 2017-08-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786928A (en) * | 2016-12-29 | 2017-05-31 | 惠州市蓝微新源技术有限公司 | A kind of BMS charge and discharge controls protection circuit |
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2016
- 2016-12-29 CN CN201621465705.1U patent/CN206389144U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786928A (en) * | 2016-12-29 | 2017-05-31 | 惠州市蓝微新源技术有限公司 | A kind of BMS charge and discharge controls protection circuit |
| CN106786928B (en) * | 2016-12-29 | 2023-10-20 | 惠州市蓝微新源技术有限公司 | BMS charge-discharge control protection circuit |
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