CN109130859A - A kind of circuit, battery case and the electric vehicle of the output of cutting on-vehicle battery - Google Patents
A kind of circuit, battery case and the electric vehicle of the output of cutting on-vehicle battery Download PDFInfo
- Publication number
- CN109130859A CN109130859A CN201710459022.8A CN201710459022A CN109130859A CN 109130859 A CN109130859 A CN 109130859A CN 201710459022 A CN201710459022 A CN 201710459022A CN 109130859 A CN109130859 A CN 109130859A
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- Prior art keywords
- circuit
- vehicle battery
- normal open
- output
- open switch
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/04—Cutting off the power supply under fault conditions
Abstract
The invention discloses circuit, battery case and the electric vehicles of a kind of cutting on-vehicle battery output, which includes fuse, normal open switch and ON-OFF control circuit；Two connecting pins of normal open switch are connect with the positive and negative electrode of on-vehicle battery respectively, the output end connection of control terminal and ON-OFF control circuit；Fuse is set to anode and/or negative output line road between on-vehicle battery and normal open switch；ON-OFF control circuit is used to send closure control signal to normal open switch, to control normal open switch closure, so that on-vehicle battery, fuse and normal open switch form short-circuit loop, the short circuit current of on-vehicle battery output is by fuse blows, to switch the output of on-vehicle battery；It solves the problems, such as that D.C. contactor volume in existing on-vehicle battery protection circuit is big, structure is complicated and higher cost, improves the energy volume ratio of battery case；Meanwhile it effectively preventing existing D.C. contactor and leading to the problem of the difference of circuit reliability caused by phenomenon of arc discharge.
Description
Technical field
The present invention relates to field of new energy technologies more particularly to it is a kind of cutting on-vehicle battery output circuit, battery case with
And electric vehicle.
Background technique
With the progress of socio-economic development and science and technology, people gradually increase the consciousness of environmental protection, country and
Government also increasingly pays close attention to the protection of ecological environment, provides good opportunity to the development of new energy technology as a result, now such as
Modern new energy technology has been increasingly becoming or has had become the popular research field of people.
Automobile brings great convenience as a kind of vehicles, to the trip as people, by itself and new energy technology
In conjunction with that is to say present new-energy automobile, be even more to receive unprecedented concern.This novel vehicles, no
As traditional fuel-engined vehicle, in the process of moving, tail gas pollution will not be generated, and noise also will be reduced greatly, be avoided
Atmospheric environment and people's lives environment are caused to seriously affect.
Existing new-energy automobile belongs to greatly high drive, passenger car voltage between 300-500 volts, car or
Lorry is even at 500 volts or more；The battery case as electric powered motor source has very high energy density simultaneously；High voltage
High risk is also implied that simultaneously with high-energy density.In normal traveling or use process, generally there is no danger, when
When in certain extreme cases, battery case be absolutely to driver and passenger it is extremely hazardous, such as vehicle occur severe crash or
When being steeped by water enchroachment (invasion), very likely there is the danger of electric leakage in battery case.Therefore, how to guarantee driver and passenger in certain extreme cases
Safety be an extremely serious problem.
Existing solution is usually that a D.C. contactor is connected on the output loop of on-vehicle battery, referring to Figure 1,
Under normal circumstances, D.C. contactor KM is in closed state, to guarantee the normal output of on-vehicle battery, but unexpected feelings is occurring
When condition, D.C. contactor KM will disconnect by force the output of on-vehicle battery, to cut off the output of on-vehicle battery, electric leakage be avoided to cause
Secondary injury.But there is also following deficiencies by D.C. contactor KM:
First is that D.C. contactor KM poor reliability: as described above, the vehicle-mounted battery of electric car has the characteristic of high voltage,
Usually along with high current, electric current is likely to be breached 200 in 100 Amps, peak point current when D.C. contactor KM is worked normally
Ampere.Under the working condition of this high current, D.C. contactor KM is disconnected by force will generate phenomenon of arc discharge, it is made to generate adhesion
It can not quickly disconnect, D.C. contactor KM must can just be completely cut through after electric current drops to safe current.And urgent
In the case of, one second even one millisecond of time of delay be all for driver and passenger it is fatal, therefore, D.C. contactor KM is at certain
Due protective effect is not had in special circumstances a bit, and reliability is poor.
Second is that D.C. contactor KM volume is big, structure is complicated and at high cost: usual 200A specification D.C. contactor is about
For 80*80*50mm or so, and the energy volume ratio of on-vehicle battery is a critically important index, in a limited space in wish
Prestige is loaded into more batteries as far as possible, and D.C. contactor occupies valuable battery space.Electricity is changed particularly with branch mailbox, it is each
The volume of a battery case is inherently small, it is also necessary to install a D.C. contactor, necessarily reduce the energy volume ratio of battery case.
Summary of the invention
Circuit, battery case and the electric vehicle of cutting on-vehicle battery output provided in an embodiment of the present invention, mainly solve
Technical problem is: it is at high cost that D.C. contactor volume is big, structure is complicated in the circuit of existing cutting on-vehicle battery output, and
Phenomenon of arc discharge, the lower problem of reliability can be generated.
In order to solve the above technical problems, the embodiment of the present invention provides a kind of circuit of cutting on-vehicle battery output, comprising: molten
Disconnected device, normal open switch and ON-OFF control circuit；
Two connecting pins of normal open switch are connect with the positive and negative electrode of on-vehicle battery respectively, the control terminal and switch of normal open switch
The output end of control circuit connects；
Fuse is set to anode and/or negative output line road between on-vehicle battery and normal open switch；
ON-OFF control circuit is used to send closure control signal to normal open switch, to control normal open switch closure, so that
On-vehicle battery, fuse and normal open switch form short-circuit loop, and the short circuit current of on-vehicle battery output is by fuse blows, to cut
The output of disconnected on-vehicle battery.
Further, the ON-OFF control circuit is connect with electronic control unit, and is sent out according to the electronic control unit
The trigger signal sent sends closure control signal to the normal open switch.
Further, the fuse is fastp-acting fuse.
Further, the normal open switch is MOS switch circuit, and the drain electrode of the MOS switch circuit and source electrode are as institute
Two connecting pins for stating normal open switch are connect with the positive and negative electrode of the on-vehicle battery respectively, the grid conduct of the MOS switch circuit
The control terminal of the normal open switch is connect with the output end of the ON-OFF control circuit；The pressure voltage of the MOS switch circuit is big
In the output voltage of the on-vehicle battery, load current value is greater than the short circuit current of on-vehicle battery output.
Further, the MOS switch circuit includes N number of MOS switch pipe, after the drain electrode of each MOS switch pipe is in parallel with institute
The anode connection for stating on-vehicle battery, connect after sources connected in parallel with the cathode of the on-vehicle battery, after gate connected in parallel with it is described
The output end of ON-OFF control circuit connects；The pressure voltage of each MOS switch fulgurite is all larger than the output electricity of the on-vehicle battery
Pressure, the sum of load current value are greater than the short circuit current of on-vehicle battery output；The N is more than or equal to 2.
Further, the ON-OFF control circuit includes trigger circuit and power circuit, and the trigger circuit includes the
One triode and the first MOS switch pipe；The source electrode of first MOS switch pipe is connected with signal generating circuit, to receive
The closure control signal of signal generating circuit generation is stated, the drain electrode of first MOS switch pipe is as the ON-OFF control circuit
Output end connect with the control terminal of the normal open switch；The collector of first triode and first MOS switch pipe
Grid connection, the emitter ground connection of first triode, the base stage of first triode and the electronic control unit
Connection, and when receiving the trigger signal that the electronic control unit is sent to it, first MOS switch pipe is connected,
The control terminal of the normal open switch is sent to control first MOS switch pipe for the closure control signal.
Further, the power circuit is used to take electricity from the on-vehicle battery, powers for the trigger circuit；The electricity
Source circuit includes filtering sub-circuit and decompression sub-circuit, and the filtering sub-circuit is filtered for connecting with the on-vehicle battery anode
Power supply after wave is sent to the decompression sub-circuit；The power supply is depressured to generate closure control by the decompression sub-circuit
Signal is sent to the drain electrode of first MOS switch pipe.
The embodiment of the present invention also provides a kind of battery case, including cabinet, be set to the intracorporal on-vehicle battery of the case and on
State the circuit of cutting on-vehicle battery output；The circuit of the cutting on-vehicle battery output includes fuse, normal open switch and opens
Control circuit is closed, two connecting pins of the normal open switch are connect with the positive and negative electrode of the on-vehicle battery respectively, the normal open switch
Control terminal connect with the output end of the ON-OFF control circuit, the fuse be set to the on-vehicle battery with it is described normally opened
Anode and/or negative output line road between switch, the ON-OFF control circuit are used to send to the normal open switch
Closure control signal, to control normal open switch closure, so that the on-vehicle battery, the fuse normally opened are opened with described
Pass forms short-circuit loop, and the short circuit current of the on-vehicle battery output is by the fuse blows, to cut off the on-vehicle battery
Output.
The embodiment of the present invention also provides a kind of electric vehicle, including electronic control unit and above-mentioned battery case；The electricity
Pond case is used to cut off the output of itself when receiving the trigger signal that the electronic control unit is sent.
Further, it is sent when the electronic control unit is for detecting default alarm level events to the battery case
For cutting off the trigger signal of battery case output.
The beneficial effects of the present invention are:
The embodiment of the present invention provides circuit, battery case and the electric vehicle of a kind of cutting on-vehicle battery output, the cutting
The circuit of on-vehicle battery output includes fuse, normal open switch and ON-OFF control circuit；Distinguish two connecting pins of normal open switch
It is connect with the positive and negative electrode of on-vehicle battery, the output end connection of control terminal and ON-OFF control circuit；Fuse is set to vehicle mounted electric
Anode and/or negative output line road between pond and normal open switch；ON-OFF control circuit is used to send to normal open switch
Closure control signal, to control normal open switch closure, so that on-vehicle battery, fuse and normal open switch form short-circuit loop,
The short circuit current of on-vehicle battery output is by fuse blows, to switch the output of on-vehicle battery；On the one hand, it solves existing
On-vehicle battery protects the problem of D.C. contactor volume in circuit is big, structure is complicated and higher cost, reduces manufacturing cost
And complexity, and the circuit for reducing cutting on-vehicle battery output improves the energy of battery case to the space hold of on-vehicle battery
Measure volume ratio；On the other hand, it avoids existing D.C. contactor and generates cutting on-vehicle battery output caused by phenomenon of arc discharge
The problem of circuit reliability difference.
Detailed description of the invention
Fig. 1 is the electrical block diagram of existing cutting on-vehicle battery output；
Fig. 2 is the electrical block diagram that a kind of cutting on-vehicle battery of the embodiment of the present invention one exports；
Fig. 3 is a kind of normal open switch electrical block diagram of the embodiment of the present invention one；
Fig. 4 is another normal open switch electrical block diagram of the embodiment of the present invention one；
Fig. 5 is a kind of ON-OFF control circuit structural schematic diagram of the embodiment of the present invention one；
Fig. 6 is a kind of signal generating circuit structural schematic diagram of the embodiment of the present invention one；
Fig. 7 is a kind of structural schematic diagram of battery case of the embodiment of the present invention two；
Fig. 8 is a kind of structural schematic diagram of electric vehicle of the embodiment of the present invention three；
Fig. 9 is the structural schematic diagram of another electric vehicle of the embodiment of the present invention three.
Specific embodiment
The embodiment of the present invention is described in further detail below by specific embodiment combination attached drawing.
Embodiment one:
D.C. contactor volume is big, structure is complicated and higher cost in order to solve in existing on-vehicle battery protection circuit,
And can lead to the problem of phenomenon of arc discharge causes reliability poor, the embodiment of the present invention provides a kind of electricity of cutting on-vehicle battery output
Road refers to Fig. 2, replaces existing D.C. contactor by fuse 21, normal open switch 22 and ON-OFF control circuit 23, makes
Circuit structure is simpler, and volume is also relatively smaller, and cost is lower, and reliability has also obtained preferable guarantee.
The circuit 20 of cutting on-vehicle battery output provided in this embodiment includes fuse 21, normal open switch 22 and switch
Control circuit 23, wherein fuse 21 includes both ends, and one end is connected with the anode of on-vehicle battery, 21 other end of fuse with it is normal
The a certain connecting pin of switch 22 is connected, and another connecting pin of normal open switch 22 is connected with the cathode of on-vehicle battery；To be formed
One link circuit, at something unexpected happened (such as vehicle collides, waterflooding etc.), normal open switch 22 is closed, by vehicle mounted electric
Pond anode, fuse 21, normal open switch 22 and on-vehicle battery cathode, which are directly connected, forms short-circuit loop (certain fuse 21
It can be set on the on-vehicle battery positive output line road between on-vehicle battery and normal open switch 22, or simultaneously in on-vehicle battery
Anode and negative output line road are provided with fuse).At this point, fuse 21 will be made fast since Short-Circuit High Current acts on
Speed heating fusing.Specifically, being to be formed by the blowout current that electric current has been more than fuse 21 due to short-circuit loop, lead to itself
Temperature seriously increases, so that fuse 21 be made to fuse, achievees the purpose that cut off on-vehicle battery output.
In the circuit 20 of cutting on-vehicle battery output provided in this embodiment, the closure of normal open switch 22 is by switch control
What circuit 23 was controlled, ON-OFF control circuit 23 is electrically connected with the control terminal of normal open switch 22, when contingency occurs, is used for
To normal open switch 22 send closure control signal, with control normal open switch 22 closure so that on-vehicle battery, fuse 21 and often
Short-circuit loop is formed between 22 three of switch, to cut off the output of on-vehicle battery.
It should be understood that ON-OFF control circuit 23 can pass through electronic control unit (ECU, Electronic
Control Unit) intelligent control, when electronic control unit monitors contingency, control switch control circuit 23 is to normally opened
Switch 22 sends closure control signal.For example, monitoring vehicle generation severe crash in electronic control unit or being steeped by water enchroachment (invasion)
When, it is possible to determine that contingency currently occurs for vehicle, at this point it is possible to ON-OFF control circuit 23 send corresponding trigger signal with
Control switch control circuit 23 sends closure control signal to normal open switch 22.(vehicle is put out normal open switch 22 under normal circumstances
Fire, normal vehicle operation etc.) it is in off-state, guarantee the normal output of on-vehicle battery electric power, when receiving switch control
Closure conducting when the closure that circuit 23 is sent to it controls signal, makes on-vehicle battery anode, fuse 21 pass through normal open switch 22
It is connected directly with on-vehicle battery cathode, forms short circuit so that the fuse 21 to fuse, avoid when contingency occurs, vehicle mounted electric
The dangerous situation that pond is leaked electricity brings very big hidden danger to driver and passenger's personal safety.
The circuit 20 of cutting on-vehicle battery output provided in the present embodiment is readily applicable to other security controls electricity
Lu Zhong, herein with no restrictions.
It should be understood that the circuit 20 of cutting on-vehicle battery output provided in this embodiment under normal circumstances should
The normal output for guaranteeing on-vehicle battery, specifically, fuse 21 should be guaranteed that will not be blown when on-vehicle battery normally exports.Example
Peak point current when normally exporting such as on-vehicle battery is 200A, then the rated current of fuse 21 can choose for 200A (or
Person 200A or so), guarantee fuse 21 normal work, but its fusing cutout should be greater than 200A, such as can be 500A,
600A etc., that is to say, that the specification of fuse 21 should be not intended to limit according to practical application flexible choice, the present embodiment and use certain
The fuse of one concrete specification.
Similarly, the normal open switch 22 in the present embodiment should also be as according to practical vehicle-mounted protection circuit flexible choice, but it should
Guarantee that it, when receiving corresponding closure control signal, can normally realize closure, and at least should be guaranteed that in fuse 21
Itself is not burned out before being blown, that is, should be guaranteed that the normal on-off of fuse 21.
The circuit 20 of cutting on-vehicle battery output provided in an embodiment of the present invention and existing D.C. contactor are dynamic then several hundred
Even the price of thousands of members compares (such as the D.C. contactor price of 200A is at 500 yuan or so), and price is relatively very cheap, and
And circuit structure is also fairly simple.In addition, provided in this embodiment cut off volume shared by the circuit 20 that on-vehicle battery exports and show
Some D.C. contactors (such as 200A volume is in 80*80*50mm or so) are compared, and volume is on 1/5th left sides of D.C. contactor
The right side provides more valuable spaces for on-vehicle battery.
Further, it in order to improve the blow out efficiency of fuse 21, that is to say when normal open switch 22 is closed, it can be faster
It fuses fastly, in the present embodiment, fuse 21 can also use fastp-acting fuse, with other fuse (spiral fusing
Device, protected cut-out etc.) unlike, fastp-acting fuse can only bear biggish overload current in a very short period of time, therefore
Ability with quick fuse.
For a better understanding of the present invention, normal open switch 22 can also be constituted in the following way, specifically refer to Fig. 3,
The normal open switch 22 is MOS switch circuit 221, wherein the drain electrode of MOS switch circuit 221 and source electrode are as normal open switch 22
Two connecting pins connect respectively with the positive and negative electrode of on-vehicle battery, the grid of the MOS switch circuit 221 is as normal open switch
The connection of the output end of control terminal and ON-OFF control circuit.ON-OFF control circuit output is received in the grid of MOS switch circuit 221
When the closure that end is sent controls signal, the source electrode and drain electrode of MOS switch circuit 221 will be connected, and that is to say the anode of on-vehicle battery
It will be shorted with cathode, the fuse blows of on-vehicle battery anode will be connected to so as to cause short circuit, disconnect on-vehicle battery
Electric power output.
Compared with existing direct current knot contactor, the normal open switch 22 in the present embodiment, which also has, is not present phenomenon of arc discharge
Advantage, as long as MOS switch circuit 221 receives the closure control signal of ON-OFF control circuit transmission, MOS switch circuit 221 will
It is connected immediately, makes fuse quick fuse within the time of Millisecond, improve the stabilization of the circuit of cutting on-vehicle battery output
Property and safety.
It should be understood that the closure that ON-OFF control circuit is exported here controls signal, physically refer to be used for
The signal for controlling the source electrode and drain electrode conducting of the MOS switch circuit 221, specifically, can be for the MOS switch circuit 221
Corresponding high level signal or low level signal.For example, the electricity for NMOS switch circuit, between grid and source electrode
It presses Vgs in 4V to 10V, is connected by the source electrode for making the NMOS switch circuit and with drain electrode, so that forming short circuit current will fuse
Device fusing；Or for PMOS switch circuit, the voltage Vgs between grid and source electrode is in -4V to -10V, it is also possible to
Make the source electrode of the PMOS switch circuit and be connected with drain electrode, so that short circuit current can also be formed by fuse blows.Therefore, originally
Embodiment is not intended to limit using what type of switching circuit, specifically can be according to actual use flexible choice.
It should be noted that the pressure voltage of MOS switch circuit 221 should be greater than the output voltage of the on-vehicle battery, MOS is opened
The load current value on powered-down road 221 should also be as the short circuit current for being greater than on-vehicle battery output.Main purpose is in vehicle mounted electric
When pond is normally carried out electric power output, MOS switch circuit can be worked normally, not breakdown；And it is closed in MOS switch circuit 221
When conjunction, it can also guarantee that the short circuit current of the on-vehicle battery will not burn MOS switch circuit 221, avoid being melt in fuse
The problem of before disconnected, MOS switch circuit 221 is burned out itself, is led to not fuse blows guarantee normally.
In the present embodiment, normal open switch 22 can be mainly made of 1 MOS switch pipe, can also (N is more than or equal to by N
2) a MOS switch pipe is constituted.It is mainly carried out by the MOS switch circuit that N number of MOS switch pipe is constituted below for normal open switch 22
It is described in detail:
Fig. 4 is referred to, it is MOS switch pipe 41, MOS switch pipe respectively that normal open switch, which is mainly made of three MOS switch pipes,
42 and MOS switch pipe 43, connect after the drain electrode of each MOS switch pipe is in parallel with the anode of on-vehicle battery, after sources connected in parallel with vehicle
The cathode connection of battery is carried, is connect after gate connected in parallel with the output end of ON-OFF control circuit；The pressure resistance of each MOS switch pipe
Value is all larger than the output voltage of on-vehicle battery, and the sum of load current value is greater than the short circuit current of on-vehicle battery output.
It should be understood that after the drain electrode of MOS switch pipe 41, MOS switch pipe 42 and MOS switch pipe 43 is in parallel with vehicle mounted electric
The anode connection in pond, therefore being equivalent to the output voltage that the voltage value that each MOS switch pipe is born is the on-vehicle battery is
The normal work of each MOS switch pipe of guarantee, pressure voltage should be more than or equal to the output voltage of the on-vehicle battery.For each
The load current value of MOS switch pipe, since each MOS switch pipe is that parallel connection is connected, the rated current of each MOS switch pipe is answered
When the one third for the short circuit current for being more than or equal to the on-vehicle battery is (assuming that these three complete phases of MOS switch pipe model specification
Together), to guarantee that the short circuit current in closure will not be burnt, guarantee that the fusing of fuse is gone on smoothly.
It that is to say, MOS switch circuit can be opened according to the output voltage and short circuit current flexible choice MOS of on-vehicle battery
The specification and number of pipe are closed, therefore, normal open switch is not limited to the connection type of above-mentioned MOS switch circuit, with specific reference to
Practical situations flexible choice.
Further, the grid of MOS switch pipe 41, MOS switch pipe 42 and MOS switch pipe 43 is separately connected a resistance
Flexible choice can be arranged according to actual circuit in the resistance value size of R2, resistance R4, resistance R9, these three resistance R2, R4, R9,
For example, 5 Europe.With guarantee receive ON-OFF control circuit output closure control signal when, can trigger MOS switch pipe 41,
MOS switch pipe 42 and MOS switch pipe 43 are connected immediately by on-vehicle battery short circuit, so that fuse blows are disconnected on-vehicle battery
Electric power output.
Specifically, can also between ON-OFF control circuit and resistance R2, resistance R4, resistance R9 a big resistance in parallel
R14 (such as resistance value is 10M), the other end ground connection of resistance R14.
In the present embodiment, ON-OFF control circuit 23 sends closure control signal to normal open switch 22 by output end, with control
Normal open switch closure processed, in order to better understand, ON-OFF control circuit is shown in Figure 5, including trigger circuit 50, wherein should
Trigger circuit 50 includes the first triode 51 and the first MOS switch pipe 52；The source electrode and power circuit of first MOS switch pipe 52
(Fig. 5 is not shown) is connected, and controls signal with the closure that power circuit generates, the drain electrode of the first MOS switch pipe 52 is as switch control
The output end of circuit processed and the control terminal of normal open switch connect；The collector of first triode 51 and the first MOS switch pipe 52
Grid connection, the emitter ground connection of the first triode 51, the base stage of the first triode 51 is connect with electronic control unit, and is being connect
When receiving the trigger signal that electronic control unit is sent to it, the first MOS switch pipe 52 is connected, to control the first MOS switch
Closure control signal is sent to the control terminal of normal open switch by pipe 52.
It should be understood that the first triode 51 as shown in Figure 5 belongs to NPN type triode, the first MOS switch pipe 52 belongs to
In PMOS tube.When trigger signal is low level signal, the first triode 51 is in off state, makes the first MOS switch pipe 52
It is also at off state, closure control signal cannot be sent to normally opened open by the drain electrode (output end) of the first MOS switch pipe 52
It closes, at this point, normal open switch is in an off state, on-vehicle battery is externally normally exported；When trigger signal is high level signal, the
One triode 51 and the first MOS switch pipe 52 are then in the conductive state, and the first MOS switch pipe 52 sends closure control signal
To the control terminal of normal open switch, its two connecting pin is closed, on-vehicle battery by normal open switch after receiving closure control signal
Short circuit current moment by fuse blows, cut off the output of on-vehicle battery.
In the present embodiment, an electricity in parallel between 51 base stage of the first triode and trigger signal end (electronic control unit)
Hold C6 (size can be 0.01uF), and the capacitor C6 other end is grounded.Between 51 base stage of capacitor C6 and the first triode, also wrap
One resistance R7 (resistance value size can be set to 1K) of series connection is included, and (resistance value size is a resistance R8 in parallel with resistance R7
100K), the resistance R8 other end is grounded after being connected with 51 emitter of the first triode.In resistance R7 and (the electronics control of trigger signal end
Unit processed) between can also be arranged in series a resistance R15 (resistance value size can be set to 1K).In addition, in the first triode 51
One resistance R6 of series connection between 52 grid of collector and the first MOS switch pipe (resistance value size can be 2.2M).
The first triode 51 and the first MOS switch pipe 52 in trigger circuit 50 can also be using other corresponding specifications
Triode or MOS switch pipe substitution, and the structure of trigger circuit is adjusted accordingly, herein with no restrictions.
In the present embodiment, ON-OFF control circuit can also include power circuit, and power circuit takes electricity from on-vehicle battery, to open
It closes control circuit and power supply is provided.Fig. 6 is referred to, which includes filtering sub-circuit 61 and decompression sub-circuit 62；Wherein,
Filtering sub-circuit 61 is connect with on-vehicle battery positive and negative anodes, for filtering the burr on on-vehicle battery signal, by filtered power supply
Signal is sent to decompression sub-circuit 62；The filtered power supply signal is depressured to generate switch control by decompression sub-circuit 62
Power supply required for circuit that is to say closure control signal, and closure control signal be sent to the first MOS switch pipe 52
Source electrode.
With continued reference to Fig. 6, filtering sub-circuit 61 further includes two capacitor C6 (specifications being connected in series with on-vehicle battery anode
Can be 0.1uF, 100V) and C5 (specification can be 0.1uF, 100V) and the resistance R3 of two series connections (resistance value can be with
For 10M) and R5, and resistance R3 and R5 access on-vehicle battery anode in parallel with capacitor C6 and C5 jointly, other end ground connection.Specifically
, the base of the triode Q4 (MMBT5551 can be used) of decompression sub-circuit 62 is directly connected between resistance R3 and resistance R5
Between pole and the cathode of zener diode D1 (BZT52C12-7-F can be used), zener diode D1 plus earth.Decompression
The collector of the triode Q4 of circuit 62 passes through a current-limiting resistance R1 (resistance value can use 470 Europe) and on-vehicle battery anode phase
Even, wherein in parallel between capacitor C6, resistance R3 and resistance R1 three to connect with on-vehicle battery anode, decompression sub-circuit 62 further includes
Triode Q1 (can use MMBT5551), and electricity is accessed after wherein the collector of triode Q4 is in parallel with the collector of triode Q1
R1 is hindered, the emitter of triode Q4 is linked into the base stage of triode Q1, and closure is controlled signal by the emitter of triode Q1
It is sent to the first MOS switch pipe 52 of trigger circuit 50.A resistance in parallel between resistance R6 and the first MOS switch pipe 52
R16 (resistance value size can be 10M), the resistance R16 other end is connected with the source electrode of the first MOS switch pipe 52.Wherein, resistance R3
Resistance value can be 10 megaohms, and resistance R1 can select 470 Europe.Resistance R5 can be without welding (DNP, Do Not
Populate), to facilitate the regulation of electrical circuit or test, corresponding buck functionality is realized.It will be apparent to a skilled person that
Each electronic device (such as capacitor C2, C4, C6, zener diode D1 etc.) in Fig. 6 is not limited to model or specification as shown in the figure,
It specifically can be according to the output voltage flexible choice of on-vehicle battery.It should be understood that the filtering sub-circuit 61 in the present embodiment
It is not limited to the above example with decompression subelement 62, specifically can also flexible setting according to the actual situation.
The circuit of cutting on-vehicle battery output provided in an embodiment of the present invention, by two connecting pins of normal open switch respectively with
The positive and negative electrode of on-vehicle battery connects, and the output end of control terminal and ON-OFF control circuit connects；Fuse is set to on-vehicle battery
Anode and/or negative output line road between normal open switch；ON-OFF control circuit is used to close to normal open switch transmission
Control signal is closed, to control normal open switch closure, so that on-vehicle battery, fuse and normal open switch form short-circuit loop, vehicle
The short circuit current of battery output is carried by fuse blows, to switch the output of on-vehicle battery；It is vehicle-mounted to solve existing cutting
The problem of D.C. contactor volume in circuit that battery exports is big, structure is complicated and higher cost, reduces cutting vehicle mounted electric
The manufacturing cost and complexity of the circuit of pond output, and reduce space of the circuit to on-vehicle battery of cutting on-vehicle battery output
It occupies, improves the energy volume ratio of battery case；Meanwhile it solving used in the circuit of existing cutting on-vehicle battery output
D.C. contactor existing for arcing problem, ensure that protection circuit reliability and safety.
Embodiment two:
The embodiment of the present invention provides a kind of electricity on the basis of the circuit for the cutting on-vehicle battery output that embodiment one provides
Pond case, which includes cabinet, that cutting described in the intracorporal on-vehicle battery of the case and above-described embodiment one is arranged in is vehicle-mounted
The circuit of battery output.Specifically refer to Fig. 7:
Battery case 70 is including cabinet 71, the on-vehicle battery 72 being arranged in the cabinet 70 and as described in above-described embodiment one
Cutting on-vehicle battery output circuit 73, wherein between 72 positive and negative anodes of on-vehicle battery access cutting on-vehicle battery output circuit
73, the circuit 73 of cutting on-vehicle battery output, which is used to automatically control when contingency occurs for vehicle, cuts off the on-vehicle battery 72
Electricity output, the personal safety for the driver and passenger that adequately protect.
Specifically, the circuit 73 of cutting on-vehicle battery output includes fuse, normal open switch and ON-OFF control circuit, institute
Two connecting pins for stating normal open switch are connect with the positive and negative electrode of on-vehicle battery 72 respectively, the control terminal and switch control of normal open switch
The output end of circuit connects, and fuse is set on the anode outlet line between on-vehicle battery 72 and normal open switch, opens
Control circuit is closed to be used to send closure control signal to normal open switch, to control normal open switch closure, so that on-vehicle battery 72,
Fuse and normal open switch form short-circuit loop, and the short circuit current that on-vehicle battery 72 exports is vehicle-mounted to cut off by fuse blows
The output of battery 72.
Further, fuse can also use fastp-acting fuse, to reduce fusing time.In the present embodiment, battery case
73 detailed construction of circuit and explanation of cutting on-vehicle battery output in 71 refer to embodiment one, and details are not described herein.
The embodiment of the present invention provides a kind of battery case, including cabinet, setting in the intracorporal on-vehicle battery of case and above-mentioned reality
The circuit for applying described in example one cutting on-vehicle battery output, by two connecting pins of normal open switch respectively with on-vehicle battery just,
The output end of cathode connection, control terminal and ON-OFF control circuit connects；Fuse be set to on-vehicle battery and normal open switch it
Between anode outlet line on；ON-OFF control circuit is used to send closure control signal to normal open switch, normally opened to control
It closes the switch, so that on-vehicle battery, fuse and normal open switch form short-circuit loop, the short circuit current of on-vehicle battery output will
Fuse blows, to switch the output of on-vehicle battery；Solves the direct current in the circuit of existing cutting on-vehicle battery output
The problem of contactor volume is big, structure is complicated and higher cost reduces the manufacturing cost of the circuit of cutting on-vehicle battery output
And complexity, and the circuit for reducing cutting on-vehicle battery output improves the energy of battery case to the space hold of on-vehicle battery
Measure volume ratio；Meanwhile solving the existing drawing of D.C. contactor used in the circuit of existing cutting on-vehicle battery output
Arch problem ensure that the reliability and safety of protection circuit.
Embodiment three:
The embodiment of the present invention provides a kind of electric vehicle, the electric vehicle on the basis of battery case that embodiment two provides
Including battery case described in electronic control unit and embodiment two, Fig. 8 is referred to:
Electric vehicle 80 includes battery case 82 described in electronic control unit 81 and embodiment two, and the battery case 82 is used for
The output of itself is cut off when receiving the trigger signal of the transmission of electronic control unit 81.Specifically, battery case 82 includes setting
The circuit of on-vehicle battery output is cut off described in the intracorporal on-vehicle battery of the case and above-described embodiment one, wherein on-vehicle battery
The circuit of access cutting on-vehicle battery output between positive and negative anodes, the circuit of cutting on-vehicle battery output is for receiving electronics
The electricity output for cutting off the on-vehicle battery is automatically controlled when the trigger signal that control unit 81 is sent, and adequately protects driver and passenger's
Personal safety.
In the present embodiment, institute is sent to battery case 82 when electronic control unit 81 is for detecting default alarm level events
State trigger signal.Default alarm level events for example can be vehicle collide, steeped etc. accidents, electronic control by water enchroachment (invasion) it is single
Member 81 sends the trigger signal to battery case 82, it should be appreciated that detects default alarm etc. for electronic control unit 81
The mode of grade event with no restrictions, can be carried out herein using existing any detection mode.
It should be understood that the battery case 81 in the present embodiment can be set in the preceding storehouse of vehicle, also can be set at middle part
Chassis position, with no restriction to this.When portion chassis position in the car is arranged in battery case, may refer to shown in Fig. 9, wherein
The electric vehicle 90 includes equally battery case 92 and electronic control unit 91, and details are not described herein.
The embodiment of the present invention provides a kind of electric vehicle, including battery described in electronic control unit and above-described embodiment two
Case sends trigger signal to battery case when wherein electronic control unit is for detecting default alarm level events, and battery case exists
After receiving the trigger signal, the output of itself will be cut off, to fully ensure that driver and passenger's personal safety.Specifically, battery case
Including cabinet, the circuit that cutting on-vehicle battery exports described in the intracorporal on-vehicle battery of case and above-described embodiment one is set,
Connect respectively with the positive and negative electrode of on-vehicle battery by two connecting pins of normal open switch, control terminal and ON-OFF control circuit it is defeated
Outlet connection；Fuse is set on the anode outlet line between on-vehicle battery and normal open switch；ON-OFF control circuit
For to normal open switch send closure control signal, with control normal open switch closure so that on-vehicle battery, fuse with it is normally opened
Switch forms short-circuit loop, and the short circuit current of on-vehicle battery output is by fuse blows, to switch the output of on-vehicle battery；Solution
It has determined that the D.C. contactor volume in the circuit of existing cutting on-vehicle battery output is big, structure is complicated and higher cost is asked
Topic, reduces the manufacturing cost and complexity of the circuit of cutting on-vehicle battery output, and reduces cutting on-vehicle battery output
Circuit improves the energy volume ratio of battery case to the space hold of on-vehicle battery；Meanwhile solving existing cutting vehicle mounted electric
Arcing problem existing for D.C. contactor used in the circuit of pond output, ensure that the reliability and safety of protection circuit
Property.
Obviously, those skilled in the art should be understood that each module of the embodiments of the present invention or each step can be used
General computing device realizes that they can be concentrated on a single computing device, or be distributed in multiple computing device institutes
On the network of composition, optionally, they can be realized with the program code that computing device can perform, it is thus possible to by them
It is stored in computer storage medium (ROM/RAM, magnetic disk, CD) and is performed by computing device, and in some cases, it can
With the steps shown or described are performed in an order that is different from the one herein, or they are fabricated to each integrated circuit dies
Block, or single integrated circuit module is maked multiple modules or steps in them to realize.So the present invention does not limit
It is combined in any specific hardware and software.
The above content is combining specific embodiment to be further described to made by the embodiment of the present invention, cannot recognize
Fixed specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs,
Without departing from the inventive concept of the premise, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to the present invention
Protection scope.
Claims (10)
1. a kind of circuit of cutting on-vehicle battery output, which is characterized in that the circuit of the cutting on-vehicle battery output includes molten
Disconnected device, normal open switch and ON-OFF control circuit；
Two connecting pins of the normal open switch are connect with the positive and negative electrode of the on-vehicle battery respectively, the control of the normal open switch
End is connect with the output end of the ON-OFF control circuit；
The fuse is set to anode and/or negative output line road between the on-vehicle battery and the normal open switch
On；
The ON-OFF control circuit is used to send closure control signal to the normal open switch, is closed with controlling the normal open switch
It closes, so that the on-vehicle battery, the fuse and the normal open switch form short-circuit loop, the on-vehicle battery output
Short circuit current is by the fuse blows, to cut off the output of the on-vehicle battery.
2. the circuit of cutting on-vehicle battery output as described in claim 1, which is characterized in that the ON-OFF control circuit and electricity
Sub-control unit connection, and the trigger signal sent according to the electronic control unit sends closure control to the normal open switch
Signal.
3. the circuit of cutting on-vehicle battery output as described in claim 1, which is characterized in that the fuse is quick fuse
Device.
4. the circuit of cutting on-vehicle battery output as described in claim 1, which is characterized in that the normal open switch is opened for MOS
Powered-down road, the drain electrode of the MOS switch circuit and source electrode as the normal open switch two connecting pins respectively with the vehicle mounted electric
The positive and negative electrode in pond connects, control terminal and switch control electricity of the grid of the MOS switch circuit as the normal open switch
The output end on road connects；The pressure voltage of the MOS switch circuit is greater than the output voltage of the on-vehicle battery, load current value
Greater than the short circuit current of on-vehicle battery output.
5. the circuit of cutting on-vehicle battery output as claimed in claim 4, which is characterized in that the MOS switch circuit includes N
A MOS switch pipe is connect after the drain electrode of each MOS switch pipe is in parallel with the anode of the on-vehicle battery, after sources connected in parallel with institute
The cathode connection of on-vehicle battery is stated, is connect after gate connected in parallel with the output end of the ON-OFF control circuit；Each MOS switch
The pressure voltage of fulgurite is all larger than the output voltage of the on-vehicle battery, and the sum of load current value is exported greater than the on-vehicle battery
Short circuit current；The N is more than or equal to 2.
6. the circuit of cutting on-vehicle battery output as described in any one in claim 1-5, which is characterized in that the switch control
Circuit includes trigger circuit and power circuit, and the trigger circuit includes the first triode and the first MOS switch pipe；It is described
The source electrode of first MOS switch pipe is connected with power circuit, controls signal to receive the closure that the power circuit generates, and described the
The drain electrode of one MOS switch pipe is connect as the output end of the ON-OFF control circuit with the control terminal of the normal open switch；It is described
The collector of first triode is connect with the grid of first MOS switch pipe, the emitter ground connection of first triode, institute
The base stage for stating the first triode is connect with the electronic control unit, and is receiving what the electronic control unit was sent to it
When trigger signal, first MOS switch pipe is connected, controls signal to control first MOS switch pipe for the closure
It is sent to the control terminal of the normal open switch.
7. the circuit of cutting on-vehicle battery output as claimed in claim 6, which is characterized in that the power circuit is used for from institute
It states on-vehicle battery and takes electricity, power for the trigger circuit；The power circuit includes filtering sub-circuit and is depressured sub-circuit, described
Filtering sub-circuit is sent to the decompression electricity for connecting with the on-vehicle battery anode, by filtered power supply signal
Road；The filtered power supply signal is depressured to generate and be closed control signal and be sent to described the by the decompression sub-circuit
The drain electrode of one MOS switch pipe.
8. a kind of battery case, which is characterized in that including cabinet, be set to the intracorporal on-vehicle battery of the case and the claims
The circuit of the described in any item cutting on-vehicle battery outputs of 1-7；It is described cutting on-vehicle battery output circuit include fuse, often
Two connecting pins of switch and ON-OFF control circuit, the normal open switch are connect with the positive and negative electrode of the on-vehicle battery respectively,
The control terminal of the normal open switch is connect with the output end of the ON-OFF control circuit, and the fuse is set to the vehicle mounted electric
Anode and/or negative output line road, the ON-OFF control circuit between pond and the normal open switch are used for described
Normal open switch sends closure control signal, to control the normal open switch closure, so that the on-vehicle battery, the fuse
Short-circuit loop is formed with the normal open switch, the short circuit current of the on-vehicle battery output is by the fuse blows, with cutting
The output of the on-vehicle battery.
9. a kind of electric vehicle, which is characterized in that including electronic control unit and battery case as claimed in claim 8；It is described
Battery case is used to cut off the output of itself when receiving the trigger signal that the electronic control unit is sent.
10. electric vehicle as claimed in claim 9, which is characterized in that the electronic control unit is for detecting default alarm
The trigger signal exported for cutting off the battery case is sent when level events to the battery case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710459022.8A CN109130859A (en) | 2017-06-16 | 2017-06-16 | A kind of circuit, battery case and the electric vehicle of the output of cutting on-vehicle battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710459022.8A CN109130859A (en) | 2017-06-16 | 2017-06-16 | A kind of circuit, battery case and the electric vehicle of the output of cutting on-vehicle battery |
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| Publication Number | Publication Date |
|---|---|
| CN109130859A true CN109130859A (en) | 2019-01-04 |
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ID=64830574
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710459022.8A Pending CN109130859A (en) | 2017-06-16 | 2017-06-16 | A kind of circuit, battery case and the electric vehicle of the output of cutting on-vehicle battery |
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| Country | Link |
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| CN (1) | CN109130859A (en) |
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| CN112606692A (en) * | 2020-12-28 | 2021-04-06 | 重庆大学 | Electric automobile safety protection device and method |
| CN113690965A (en) * | 2021-07-09 | 2021-11-23 | 东莞新能安科技有限公司 | Protection circuit and circuit board, battery management system and battery package |
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| CN114188625A (en) * | 2021-12-07 | 2022-03-15 | 北京国电通网络技术有限公司 | Battery monomer control method and device |
| US11600992B2 (en) * | 2018-12-06 | 2023-03-07 | Contemporary Amperex Technology Co., Limited | Electric protection circuit |
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